Exercise algebra.manipulation.rational.simplify
Description
simplify a rational expression (with a variable in a divisor)
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
(a^2-9)/(a^3-4*a^2+3*a)
⇒ algebra.equations.polynomial.factor-varpower(a^2-9)/(a*(a^2-4*a+3))
⇒ algebra.equations.quadratic.nice-factors(a^2-9)/(a*(a-1)*(a-3))
⇒ algebra.equations.quadratic.nice-factors(a+3)*(a-3)/(a*(a-1)*(a-3))
⇒ algebra.equations.rational.cancel-div, clipboard=[condition == (a /= 3)](a+3)/(a*(a-1))