$\lim_{x\to\frac{\pi}{2}}\left(\frac{\sqrt{\cos\left(x\right)}-\cos\left(x\right)}{2.\sin\left(x\right).\cos\left(x\right)}\right)$

$\sin^52x\cos^2\left(2x\right)$

$\left(\frac{3}{8}\right)w^3\left(\frac{-4w^5}{5}\right)\left(5w^2\right)$

$y'=3x$

$24ab+30ac-18ad$

$\left(x+y+5\right)^3$

$sin\left(\frac{\pi}{12}\right)cos\left(\frac{7\pi}{12}\right)-cos\left(\frac{\pi}{12}\right)sin\left(\frac{7\pi}{12}\right)$