This library allows you to render overloaded expressions to their textual representation. For example:

*Repr> let r = 1.5 + 2 + (3 + (-4) * (5 - pi / sqrt 6)) :: Repr Double
*Repr> extract r
17.281195923884734
*Repr> show rd
"1.5 + 2.0 + (3.0 + negate 4.0 * (5.0 - pi / sqrt 6.0))"