Evaluate the following integrals:
(a) $\int x ^ { 3 } e ^ { \left( x ^ { 4 } + 1 \right) } d x$ (b) $\int \frac { e ^ { ( \sqrt { x } ) } } { \sqrt { x } } d x$ (c) $\int \frac { e ^ { ( 1 / x ) } } { x ^ { 2 } } d x$ (d) $\int \frac { e ^ { ( \arctan x ) } } { 1 + x ^ { 2 } } d x$

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The Answer of Evaluate the following integrals:
(a) $\int x ^ { 3 } e ^ { \left( x ^ { 4 } + 1 \right) } d x$ (b) $\int \frac { e ^ { ( \sqrt { x } ) } } { \sqrt { x } } d x$ (c) $\int \frac { e ^ { ( 1 / x ) } } { x ^ { 2 } } d x$ (d) $\int \frac { e ^ { ( \arctan x ) } } { 1 + x ^ { 2 } } d x$

Evaluate the Following Integrals: (A) ∫x3e(x4+1)dx\int x ^ { 3 } e ^ { \left( x ^ { 4 } + 1 \right) } d x∫x3e(x4+1)dx

Evaluate the Following Integrals:
(A) $\int x ^ { 3 } e ^ { \left( x ^ { 4 } + 1 \right) } d x$