$\frac{\sin\left(x\right)\cdot\tan\left(x\right)+\cos\left(x\right)}{cos\left(x\right)\cdot\cot\left(x\right)+\sin\left(x\right)}$

$\lim_{x\to0}\left(\frac{4\ln\tan\left(x\right)}{\ln\left(\sin\left(x\right)\right)}\right)$

$2^3\cdot2^5\cdot2^{-4}$

$\sqrt[4]{3a}-\sqrt[5]{3a}-\sqrt[11]{3a}$

$\lim_{x\to\pi}\left(\frac{2-sinx}{2sinx}\right)$

$25^4-40x^2+16$

$9x^2-18x-36$