I.3.3.34 Definite Integrals

Condition: Find certain integrals. 1) \ (\ int_ {0}^{1} \ frac {e^{\ frac {x} {x+1}}} {(x+1)^}} d x \); 2) \ (\ int_ {0} ^{\ frac {\ pi} {4}} \ tan ^{2} x d x \).