Input: dsolve(y'=sin(x+ y))
Write: dsolve(y'=sin(x+ y))
Output: dsolve(y'=sin(x+y))== (-2.0)\ (atan(-C_1-x)-\frac{1}{4}\ \pi )-x
(dy)/(dx) -exp(y-1)-exp(x) = 0
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