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)