$\lim_{x\to0}\left(\frac{1-e^{x^2}}{1-cosx}\right)$

$\lim_{x\to\infty}\left(e^{4x}-e^{-4x}\right)$

$1+2-3x^2-3x^4+3x^4+3-3$

$\sqrt{0.004464999999999999}$

$\tan^2\left(x\right)\cos^2\left(x\right)\cot^2\left(x\right)=0$

$\int\log\left(xe^{7x}\right)dx$

$\left(7p\right)\left(2n-pn+7pn^2\right)$