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2.23.1  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

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