$\sqrt{25m^{4-2x}n^8y^{-6}}$

$x-10x+26$

$\frac{d^2}{dx^2}\left(cos^36x\right)$

$\lim_{x\to\frac{\pi}{2}}\left(cos\left(x\right)ln\left(tan\left(x\right)\right)\right)$

$6.5\left(x+1\right)$

$8x-8\le-72$

$\sin\left(\frac{5\pi}{8}\right)\cos\left(\frac{\pi}{8}\right)$