$\int\cot\left(2x\right).\csc^{\frac{5}{2}}\left(2x\right)dx$

$\int\left(1-\left(1-sin^2\left(u\right)\right)\right)cos\left(u\right)du$

$\left(12xy\:+\:25y\right)^3$

$12+4x=4x-12$

$\lim_{x\to\frac{\pi}{2}}\left(1+2cos\right)^{cosx}$

$\frac{8x}{\tan\left(7x\right)}$

$2\tan\left(x\right)=-5$