Exercise algebra.manipulation.rational.simplify

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

Derivation

(a^2-2*a-15)/(a^2-3*a-18)

⇒ algebra.equations.quadratic.nice-factors

(a^2-2*a-15)/((a+3)*(a-6))

⇒ algebra.equations.quadratic.nice-factors

(a+3)*(a-5)/((a+3)*(a-6))

⇒ algebra.equations.rational.cancel-div, clipboard=[condition == (a /= -3)]

(a-5)/(a-6)