(-12.0 + x^2)/(-3.0 + x) - x/(3.0 - x)
(-12.0 + x^2)/(-3.0 + x) - x/(3.0 - x)
/ 2\ \-12 + x /*(3 - x) - x*(-3 + x) ------------------------------- (-3 + x)*(3 - x)
((-12 + x^2)*(3 - x) - x*(-3 + x))/((-3 + x)*(3 - x))
/ 2\ \-12 + x /*(3 - x) - x*(-3 + x) ------------------------------- (-3 + x)*(3 - x)
((-12 + x^2)*(3 - x) - x*(-3 + x))/((-3 + x)*(3 - x))