Exercise algebra.manipulation.rational.simplify

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

Derivation

(x^2-16)/(x^2+x-12)

⇒ algebra.equations.quadratic.nice-factors

(x^2-16)/((x-3)*(x+4))

⇒ algebra.equations.quadratic.nice-factors

(x+4)*(x-4)/((x-3)*(x+4))

⇒ algebra.equations.rational.cancel-div, clipboard=[condition == (x /= -4)]

(x-4)/(x-3)