$m\sqrt[5]{m^4n}.\frac{2}{m^3}\sqrt[5]{mn^5}.\frac{m}{4}\sqrt[5]{m^3n^3}$

$\lim\:_{x\to\:0}\left(\frac{3x}{\:\sqrt{2x-49}-7}\right)$

$\tan\left(\infty\right)+\frac{\cos\left(\infty\right)}{1+\sin\left(\infty\right)}=\sec\left(\infty\right)$

$\sqrt{x+3}^2$

$15.32\cdot0.3$

$x^2-17x+38=0$

$5x+4x-7x+3y-8y-6y-8+10+20$