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Input:
dsolve(ds(y)=exp(y)-exp(x))
Write:
`dsolve(ds(y)=exp(y)-exp(x))`
Compute:
$$dsolve(\frac{dy}{dx} =(-exp(x))+exp(y))$$
Output:
$$dsolve(\frac{dy}{dx} =(-exp(x))+exp(y))== (-exp(x))-log(C_1-Ei((-exp(x))))$$
Result: $$(-exp(x))-log(C_1-Ei((-exp(x))))$$
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