$\left(x^4+2\right)\left(x^8+2x^4+4\right)$

$\tan\left(2x\right)\sin\left(x\right)-\sin\left(x\right)-\tan\left(2x\right)+1$

$\lim_{x\to\infty}\left(1+7x\right)^{\frac{5}{x}}$

$\int t\cdot e^{-3t-jwt}dx$

$\lim_{x\to\infty}\left(1+\frac{1}{x}\right)^{2lnx}$

$81x^2+16x-72=0$

$\log x=-1.75$