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)
7/(5*a)-2
⇒ algebra.equations.rational.to-rational7/(5*a)-10*a/(5*a)
⇒ algebra.equations.rational.rational-plus(7-10*a)/(5*a)