### 5.26.1 Rewrite hyperbolic functions as exponentials : hyp2exp

hyp2exp takes as argument an hyperbolic expression.

hyp2exp rewrites each hyperbolic functions with exponentials
(as a rational fraction of one exponential,
i.e. without linearization).

Input :

hyp2exp(sinh(x))

Output :

(exp(x)-1/(exp(x)))/2