1. ∫ − 1 1 e u + 1 d u {\displaystyle \int \limits _{-1}^{1}e^{u+1}du} = ∫ − 1 1 e u e 1 d u {\displaystyle \int \limits _{-1}^{1}e^{u}e^{1}du} = e^{1} ∫ − 1 1 e u {\displaystyle \int \limits _{-1}^{1}e^{u}}
