$ f(z) = (1 - e^z)(z + e^z) $
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it's clear. So when you read here So we're gonna take the derivative, Do you over D. C. One minus Eat the sea times e to the C plus C. It's this equal to D over easy one minus eat sissy times beat the C plus C plus one minus. Eat the sea Do you over D C to the C plus C only simplify. We get zero minus you to the sea comes each. Does he plus C plus B to the A C plus one time one minus e to the C when we get negative to e to the to see minus the E to the C plus one.