two *((x - one)/(x + one) - one)*(three *(x - one)/(x + one) - one)/(x + one)^ two = zero
2 multiply by ((x minus 1) divide by (x plus 1) minus 1) multiply by (3 multiply by (x minus 1) divide by (x plus 1) minus 1) divide by (x plus 1) squared equally 0
two multiply by ((x minus one) divide by (x plus one) minus one) multiply by (three multiply by (x minus one) divide by (x plus one) minus one) divide by (x plus one) to the power of two equally zero