Exercise

Exercise algebra.manipulation.rational.simplify

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

Derivation

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

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

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

(x^2-4+x^2+2*x-3)/((x+3)*(x+2))

(2*x^2-7+2*x)/((x+3)*(x+2))