Step 1 :\(\int \frac{\sin x}{\cos ^{7} x} d x = \int \sin x \cos^{-7}x dx\)
Step 2 :\(\int_{0}^{1} \frac{x \arctan \left(x^{2}\right)}{1+x^{4}} d x\)
Step 3 :\(\int \cos ^{6} x \sin x \tan ^{2} x d x \)
Step 4 :\(\int \frac{2 x+5}{x^{3}+5 x} d x\)
Step 5 :\(f(x)=\int_{1}^{t} \sin (\ln t) d t\); \(g(x)=\int_{1}^{e^{t}} \cos (\ln t) d t\); \(f\left(\frac{\pi}{2}\right)+g\left(\frac{\pi}{2}\right)\)
Step 6 :\(\int_{-\pi}^{\pi}\left|\cos ^{3} x\right| d x\)
Step 7 :\(\int \frac{d x}{\sqrt{-x^{2}+4 x+5}}\)