Exercise algebra.manipulation.rational.simplify

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

Derivation

2*x/(x-1)+x/(x+2)

⇒ algebra.equations.rational.rational-scale

(x+2)*2*x/((x-1)*(x+2))+(x-1)*x/((x-1)*(x+2))

⇒ algebra.equations.rational.rational-plus

((x+2)*2*x+(x-1)*x)/((x-1)*(x+2))

⇒ algebra.equations.linear.distr-times

(2*x^2+4*x+x^2-x)/((x-1)*(x+2))

⇒ algebra.equations.linear.merge

(3*x^2+3*x)/((x-1)*(x+2))