Input:
toexp(cos(x))
Write:
toexp(cos(x))
Output:
convert \ to \ exp :\\ \ cos(x)== \frac{1}{2}\ exp((-i)\ x)+\frac{1}{2}\ exp(i\ x)
(d^1.6y)/(dx^1.6)-(d^0.8y)/dx^0.8-y-exp(x)=0
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