Exercise algebra.manipulation.rational.simplify

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

Derivation

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

⇒ algebra.equations.rational.rational-scale

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

⇒ algebra.equations.rational.rational-plus

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

⇒ algebra.equations.linear.distr-times

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

⇒ algebra.equations.linear.merge

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