Tìm
a) \(\int {\left( {2{x^5} + 3} \right)dx} \)
b) \(\int {\left( {5\cos x - 3\sin x} \right)dx} \)
c) \(\int {\left( {\frac{{\sqrt x }}{2} - \frac{2}{x}} \right)dx} \)
d) \(\int {\left( {{e^{x - 2}} - \frac{2}{{{{\sin }^2}x}}} \right)dx} \)
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