Exercise algebra.manipulation.rational.simplify
Description
simplify a rational expression (with a variable in a divisor)
Derivation
((x-2)*6-(x-1)*3)/((x-1)*(x-2))
⇒ algebra.equations.linear.distr-times(6*x-12-3*x+3)/((x-1)*(x-2))
⇒ algebra.equations.linear.merge(3*x-9)/((x-1)*(x-2))