Exercise algebra.manipulation.rational.simplify

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

Derivation

(a^2-3*a-10)/(a^2-a-20)

⇒ algebra.equations.quadratic.nice-factors

(a^2-3*a-10)/((a+4)*(a-5))

⇒ algebra.equations.quadratic.nice-factors

(a+2)*(a-5)/((a+4)*(a-5))

⇒ algebra.equations.rational.cancel-div, clipboard=[condition == (a /= 5)]

(a+2)/(a+4)