Exercise algebra.manipulation.rational.simplify

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

Derivation

2/(3*x)+1/(2*y)

⇒ algebra.equations.rational.rational-scale

4*y/(6*x*y)+3*x/(6*x*y)

⇒ algebra.equations.rational.rational-plus

(4*y+3*x)/(6*x*y)