$\left(a^4+8\right)\left(-9a^4-1\right)$

$\sqrt{a}^2+b^2+2$

$\lim_{x\to\infty}\left(\frac{5x^3+2}{3x^2+4}\right)$

$\lim_{x\to0}\left(\frac{\ln\left(x+5\right)^5}{\ln\left(x^2\right)}\right)$

$\frac{dy}{dx}=1-3y-x$

$\left(5x^3-2y^5\right)^3$

$\lim_{x\to0}\left(\frac{\ln\left(x+1\right)}{\ln\left(3+x^2\right)}\right)$