Evaluate the Following Integrals:
(A) $\int x \sec ^ { 2 } x d x$

Essay

Evaluate the following integrals:
(a) $\int x \sec ^ { 2 } x d x$ (b) $\int \left( 3 x ^ { 2 } + 1 \right) \ln \left( x ^ { 2 } + 1 \right) d x$ (c) $\int \frac { e ^ { \sqrt { x } } } { \sqrt { x } } d x$ (d) $\int e ^ { \sqrt { x } } d x$