Exercise algebra.manipulation.rational.simplify
Description
simplify a rational expression (with a variable in a divisor)
Derivation
2*a-1/(3*a)
⇒ algebra.equations.rational.to-rational6*a^2/(3*a)-1/(3*a)
⇒ algebra.equations.rational.rational-plus(6*a^2-1)/(3*a)