Exercise algebra.manipulation.rational.simplify
Description
simplify a rational expression (with a variable in a divisor)
Derivation
7/(4*a)+3/(4*b)
⇒ algebra.equations.rational.rational-scale7*b/(4*a*b)+3*a/(4*a*b)
⇒ algebra.equations.rational.rational-plus(7*b+3*a)/(4*a*b)