Đề bài

Tìm:

a) $\int {2x({x^3}}  - x + 2)dx$

b) $\int {\left( {2x + \frac{1}{{{x^3}}}} \right)} dx$

c) $\int {\left( {3 + 2{{\tan }^2}x} \right)} dx$

d) $\int {\left( {1 - 3{{\cot }^2}x} \right)} dx$

e) $\int {\left( {\sin  + {2^{ - x + 1}}} \right)} dx$

g) $\int {\left( {{{2.6}^{2x}} - {e^{ - x + 1}}} \right)} dx$