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How do you ((x+3)/(x-1))^2+14(x^2-9)/(x^2-1)-15((x-3)/(x+1))^2 in partial fractions?

An expression to simplify:

The solution

You have entered [src]
       2      / 2    \             2
/x + 3\    14*\x  - 9/      /x - 3\ 
|-----|  + ----------- - 15*|-----| 
\x - 1/        2            \x + 1/ 
              x  - 1                
$$- 15 \left(\frac{x - 3}{x + 1}\right)^{2} + \left(\left(\frac{x + 3}{x - 1}\right)^{2} + \frac{14 \left(x^{2} - 9\right)}{x^{2} - 1}\right)$$
((x + 3)/(x - 1))^2 + (14*(x^2 - 9))/(x^2 - 1) - 15*(x - 3)^2/(x + 1)^2
General simplification [src]
     /             2\
64*x*\6 - 7*x + 2*x /
---------------------
         4      2    
    1 + x  - 2*x     
$$\frac{64 x \left(2 x^{2} - 7 x + 6\right)}{x^{4} - 2 x^{2} + 1}$$
64*x*(6 - 7*x + 2*x^2)/(1 + x^4 - 2*x^2)
Fraction decomposition [src]
-240/(1 + x)^2 - 48/(-1 + x) + 16/(-1 + x)^2 + 176/(1 + x)
$$\frac{176}{x + 1} - \frac{240}{\left(x + 1\right)^{2}} - \frac{48}{x - 1} + \frac{16}{\left(x - 1\right)^{2}}$$
    240        48         16       176 
- -------- - ------ + --------- + -----
         2   -1 + x           2   1 + x
  (1 + x)             (-1 + x)         
Expand expression [src]
       2      / 2    \             2
(x + 3)    14*\x  - 9/   15*(x - 3) 
-------- + ----------- - -----------
       2       2                  2 
(x - 1)       x  - 1       (x + 1)  
$$- \frac{15 \left(x - 3\right)^{2}}{\left(x + 1\right)^{2}} + \frac{14 \left(x^{2} - 9\right)}{x^{2} - 1} + \frac{\left(x + 3\right)^{2}}{\left(x - 1\right)^{2}}$$
(x + 3)^2/(x - 1)^2 + (14*(x^2 - 9))/(x^2 - 1) - 15*(x - 3)^2/(x + 1)^2
Rational denominator [src]
       2 /        2 /           2\          2 /      2\\              2         2 /      2\
(1 + x) *\(-1 + x) *\-126 + 14*x / + (3 + x) *\-1 + x // - 15*(-1 + x) *(-3 + x) *\-1 + x /
-------------------------------------------------------------------------------------------
                                       2         2 /      2\                               
                                (1 + x) *(-1 + x) *\-1 + x /                               
$$\frac{- 15 \left(x - 3\right)^{2} \left(x - 1\right)^{2} \left(x^{2} - 1\right) + \left(x + 1\right)^{2} \left(\left(x - 1\right)^{2} \left(14 x^{2} - 126\right) + \left(x + 3\right)^{2} \left(x^{2} - 1\right)\right)}{\left(x - 1\right)^{2} \left(x + 1\right)^{2} \left(x^{2} - 1\right)}$$
((1 + x)^2*((-1 + x)^2*(-126 + 14*x^2) + (3 + x)^2*(-1 + x^2)) - 15*(-1 + x)^2*(-3 + x)^2*(-1 + x^2))/((1 + x)^2*(-1 + x)^2*(-1 + x^2))
Assemble expression [src]
        2              2              2
 (3 + x)    -126 + 14*x    15*(-3 + x) 
--------- + ------------ - ------------
        2           2               2  
(-1 + x)      -1 + x         (1 + x)   
$$- \frac{15 \left(x - 3\right)^{2}}{\left(x + 1\right)^{2}} + \frac{14 x^{2} - 126}{x^{2} - 1} + \frac{\left(x + 3\right)^{2}}{\left(x - 1\right)^{2}}$$
(3 + x)^2/(-1 + x)^2 + (-126 + 14*x^2)/(-1 + x^2) - 15*(-3 + x)^2/(1 + x)^2
Trigonometric part [src]
        2              2              2
 (3 + x)    -126 + 14*x    15*(-3 + x) 
--------- + ------------ - ------------
        2           2               2  
(-1 + x)      -1 + x         (1 + x)   
$$- \frac{15 \left(x - 3\right)^{2}}{\left(x + 1\right)^{2}} + \frac{14 x^{2} - 126}{x^{2} - 1} + \frac{\left(x + 3\right)^{2}}{\left(x - 1\right)^{2}}$$
(3 + x)^2/(-1 + x)^2 + (-126 + 14*x^2)/(-1 + x^2) - 15*(-3 + x)^2/(1 + x)^2
Combining rational expressions [src]
       2 /       2 /      2\              2 /      2\\              2         2 /      2\
(1 + x) *\(3 + x) *\-1 + x / + 14*(-1 + x) *\-9 + x // - 15*(-1 + x) *(-3 + x) *\-1 + x /
-----------------------------------------------------------------------------------------
                                      2         2 /      2\                              
                               (1 + x) *(-1 + x) *\-1 + x /                              
$$\frac{- 15 \left(x - 3\right)^{2} \left(x - 1\right)^{2} \left(x^{2} - 1\right) + \left(x + 1\right)^{2} \left(14 \left(x - 1\right)^{2} \left(x^{2} - 9\right) + \left(x + 3\right)^{2} \left(x^{2} - 1\right)\right)}{\left(x - 1\right)^{2} \left(x + 1\right)^{2} \left(x^{2} - 1\right)}$$
((1 + x)^2*((3 + x)^2*(-1 + x^2) + 14*(-1 + x)^2*(-9 + x^2)) - 15*(-1 + x)^2*(-3 + x)^2*(-1 + x^2))/((1 + x)^2*(-1 + x)^2*(-1 + x^2))
Numerical answer [src]
(-126.0 + 14.0*x^2)/(-1.0 + x^2) + 9.0*(1 + 0.333333333333333*x)^2/(-1.0 + x)^2 - 135.0*(-1 + 0.333333333333333*x)^2/(1.0 + x)^2
(-126.0 + 14.0*x^2)/(-1.0 + x^2) + 9.0*(1 + 0.333333333333333*x)^2/(-1.0 + x)^2 - 135.0*(-1 + 0.333333333333333*x)^2/(1.0 + x)^2
Common denominator [src]
       2        3        
- 448*x  + 128*x  + 384*x
-------------------------
           4      2      
      1 + x  - 2*x       
$$\frac{128 x^{3} - 448 x^{2} + 384 x}{x^{4} - 2 x^{2} + 1}$$
(-448*x^2 + 128*x^3 + 384*x)/(1 + x^4 - 2*x^2)
Powers [src]
        2              2              2
 (3 + x)    -126 + 14*x    15*(-3 + x) 
--------- + ------------ - ------------
        2           2               2  
(-1 + x)      -1 + x         (1 + x)   
$$- \frac{15 \left(x - 3\right)^{2}}{\left(x + 1\right)^{2}} + \frac{14 x^{2} - 126}{x^{2} - 1} + \frac{\left(x + 3\right)^{2}}{\left(x - 1\right)^{2}}$$
(3 + x)^2/(-1 + x)^2 + (-126 + 14*x^2)/(-1 + x^2) - 15*(-3 + x)^2/(1 + x)^2
Combinatorics [src]
64*x*(-3 + 2*x)*(-2 + x)
------------------------
          2         2   
   (1 + x) *(-1 + x)    
$$\frac{64 x \left(x - 2\right) \left(2 x - 3\right)}{\left(x - 1\right)^{2} \left(x + 1\right)^{2}}$$
64*x*(-3 + 2*x)*(-2 + x)/((1 + x)^2*(-1 + x)^2)