Exercise algebra.manipulation.rational.simplify

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

Derivation

5/(x+2)+4/(x+3)

⇒ algebra.equations.rational.rational-scale

(x+3)*5/((x+2)*(x+3))+(x+2)*4/((x+2)*(x+3))

⇒ algebra.equations.rational.rational-plus

((x+3)*5+(x+2)*4)/((x+2)*(x+3))

⇒ algebra.equations.linear.distr-times

(5*x+15+4*x+8)/((x+2)*(x+3))

⇒ algebra.equations.linear.merge

(9*x+23)/((x+2)*(x+3))