$\frac{\left(1-cot^2\left(x\right)\right)}{\left(cos\left(x\right)+cos\left(x\right)cot\left(x\right)\right)}$

$11x\cdot4x^4$

$\int4.02\cdot\left(e^{\left(-4.02x\right)}\right)$

$\left(5ab\right)^2$

$-100\::-10$

$\lim_{x\to0}\left(\frac{1+\tan\left(x\right)}{1-\tan\left(x\right)}\right)^{\left(\frac{1}{\sin\left(x\right)}\right)}$

$\frac{a}{3\sqrt{2}}$