$8x-7-10x-9$

$\frac{x^{-2}}{y^{-2}}$

$\frac{\sin\left(x\right)+\cos\left(x\right)}{\sin\left(x\right)}=1-\tan\left(x\right)$

$\left(\frac{dy}{dx}\right)^2+3x^2\cdot y=x^2$

$2p^2-p+10=0$

$\lim_{x\to\infty}\left(\frac{x^k}{e^x}\right)$

$\lim_{h\to\infty}\left(\frac{3h+2xh^2+x^2h^3}{4-3xh-2x^3h^3}\right)$