$\left(5a^2+4b^3\right)^3$

$f\left(x\right)=x^3+x^2-6x$

$xy'=2x+3y$

$\:-\left(-5\right)+\left(-5\right)-\left[\left(+8\right)+\left(-10\right)\right]$

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

$9\tan^2x-9\tan^2x\sin^2x$

$\int x\left(7x-11x^2-7\right)dx$