Fraction decomposition
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-3 + 6*a + 9/a^2 + 10/a + 18/a^3
$$6 a - 3 + \frac{10}{a} + \frac{9}{a^{2}} + \frac{18}{a^{3}}$$
9 10 18
-3 + 6*a + -- + -- + --
2 a 3
a a
General simplification
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9 10 18
-3 + 6*a + -- + -- + --
2 a 3
a a
$$6 a - 3 + \frac{10}{a} + \frac{9}{a^{2}} + \frac{18}{a^{3}}$$
-3 + 6*a + 9/a^2 + 10/a + 18/a^3
2
18 + 9*a + 10*a
-3 + 6*a + ----------------
3
a
$$6 a - 3 + \frac{10 a^{2} + 9 a + 18}{a^{3}}$$
-3 + 6*a + (18 + 9*a + 10*a^2)/a^3
18
a + --
9 9 a
-3 + 6*a + - + -- + ------
a 2 2
a a
$$6 a - 3 + \frac{9}{a} + \frac{a + \frac{18}{a}}{a^{2}} + \frac{9}{a^{2}}$$
-3 + 6*a + 9/a + 9/a^2 + (a + 18/a)/a^2
Combining rational expressions
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3 4 2
18 - 3*a + 6*a + 9*a + 12*a + a*(-3 + a)
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3
a
$$\frac{6 a^{4} - 3 a^{3} + 9 a^{2} + a \left(a - 3\right) + 12 a + 18}{a^{3}}$$
(18 - 3*a^3 + 6*a^4 + 9*a^2 + 12*a + a*(-3 + a))/a^3
18
a + --
9 9 a
-3 + 6*a + - + -- + ------
a 2 2
a a
$$6 a - 3 + \frac{9}{a} + \frac{a + \frac{18}{a}}{a^{2}} + \frac{9}{a^{2}}$$
-3 + 6*a + 9/a + 9/a^2 + (a + 18/a)/a^2
3 4 2
18 - 3*a + 6*a + 9*a + 10*a
------------------------------
3
a
$$\frac{6 a^{4} - 3 a^{3} + 10 a^{2} + 9 a + 18}{a^{3}}$$
(18 - 3*a^3 + 6*a^4 + 9*a + 10*a^2)/a^3
Assemble expression
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18
a + --
9 9 a
-3 + 6*a + - + -- + ------
a 2 2
a a
$$6 a - 3 + \frac{9}{a} + \frac{a + \frac{18}{a}}{a^{2}} + \frac{9}{a^{2}}$$
-3 + 6*a + 9/a + 9/a^2 + (a + 18/a)/a^2
Rational denominator
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6 5 / 6 3 2 \
- 3*a + 9*a + a*\6*a + 9*a + a *(18 + 3*a + a*(-3 + a))/
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6
a
$$\frac{- 3 a^{6} + 9 a^{5} + a \left(6 a^{6} + 9 a^{3} + a^{2} \left(a \left(a - 3\right) + 3 a + 18\right)\right)}{a^{6}}$$
(-3*a^6 + 9*a^5 + a*(6*a^6 + 9*a^3 + a^2*(18 + 3*a + a*(-3 + a))))/a^6
-3.0 + 6.0*a + 9.0/a + 9.0/a^2 + (a + 18.0/a)/a^2
-3.0 + 6.0*a + 9.0/a + 9.0/a^2 + (a + 18.0/a)/a^2