Exercise algebra.manipulation.rational.simplify

Description
simplify a rational expression (with a variable in a divisor)

Derivation

Final term is not finished

(a^2-2*a-15)/(a^2*(a-3)-10*a)

⇒ algebra.equations.linear.distr-times

(a^2-2*a-15)/(a^3-3*a^2-10*a)