Exercise algebra.manipulation.rational.simplify

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

Derivation

3/(x^2*y)-5/(2*x*y)

⇒ algebra.equations.rational.rational-scale

6/(2*x^2*y)-5*x/(2*x^2*y)

⇒ algebra.equations.rational.rational-plus

(6-5*x)/(2*x^2*y)