Question: In Problems 31 through 42, verify that the given differential equation is exact; then solve it. (x + tan- y) dx + x + y

In Problems 31 through 42, verify that the given differential equation is exact; then solve it.

(x + tan- y) dx + x + y 1+ y2 dy

(x + tan- y) dx + x + y 1+ y2 dy = 0

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