$\frac{d}{dx}y=x^2+3x^5+4$

$1-20+1-198$

$\lim_{x\to\infty}\left(\cos\left(\frac{2}{x}\right)\right)^{x^3}$

$\frac{d}{dx}\left(\frac{\left(e^x-e^{-x}\right)}{\left(e^x+e^{-x}\right)}\right)$

$9.7=-\log_{10}\left(x\right)$

$\int\sqrt{4x^2-16}dx$

$3\cdot\left(15-5\right)\cdot\left[6+\left(9-3\right)\right]+\left[6\cdot\left(-8\right):12\right]$