Question: Find the antiderivative of the following functions

(a) \(\int{\left( {{e}^{x}}-2{{\csc }^{2}}x-\pi \right)dx}\)

(b) \(\int{\frac{{{x}^{5}}-3x+1}{{{x}^{2}}}}dx\)

(c) \(\int{5{{x}^{4}}{{\left( 2-4{{x}^{5}} \right)}^{1/3}}dx}\)

(d) \(\int{\left( \frac{\cos x-\sin x}{\cos x+\sin x} \right)dx}\)