$2x^2+3x-22-4x^2-5x+7+\left(x-4\right)$

$\left(y-4\right)\left(y+4\right)^2$

$\lim_{x\to\infty}\left(\frac{\left(3x-1\right)}{x^2}\right)^x$

$\lim_{x\to0}\left(\frac{3e^x+2x-3}{x}\right)$

$x^{4}+10x^{2}+25$

$\int\frac{1}{x^5\sqrt{5x^2-9}}dx$

$\frac{dy}{dx}=\frac{3-x}{2e^{y}}$