Input:
dsolve(ds(y,x,-2)=y-exp(x))
Write:
`dsolve(ds(y,x,-2)=y-exp(x))`
Output:
$$dsolve(\int \int y\ (dx)^{2.0}=y - exp(x))== C_1\ exp(x)+C_2\ exp(-x)+\frac{1}{2}\ exp(x)\ x$$
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