two *(one - (x + three)/x)*(- one /(x + three) - one /x)/(x + three) = zero
2 multiply by (1 minus (x plus 3) divide by x) multiply by ( minus 1 divide by (x plus 3) minus 1 divide by x) divide by (x plus 3) equally 0
two multiply by (one minus (x plus three) divide by x) multiply by ( minus one divide by (x plus three) minus one divide by x) divide by (x plus three) equally zero
2(1 - (x + 3)/x)(-1/(x + 3) - 1/x)/(x + 3) = 0
21 - x + 3/x-1/x + 3 - 1/x/x + 3 = 0
2*(1 - (x + 3) divide by x)*(-1 divide by (x + 3) - 1 divide by x) divide by (x + 3) = 0