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)
1/x+1/y
⇒ algebra.equations.rational.rational-scaley/(x*y)+x/(x*y)
⇒ algebra.equations.rational.rational-plus(y+x)/(x*y)