Exercise algebra.manipulation.rational.simplify

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

Derivation

(a^2-a-2)/(a^2+4*a-12)

⇒ algebra.equations.quadratic.nice-factors

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

⇒ algebra.equations.quadratic.nice-factors

(a+1)*(a-2)/((a-2)*(a+6))

⇒ algebra.equations.rational.cancel-div, clipboard=[condition == (a /= 2)]

(a+1)/(a+6)