$\sqrt{2}.\sqrt{2}.\sqrt{64}$

$\frac{z+78}{2}=22$

$20x^3+10x^2+30x$

$2\sin^2\left(\frac{x}{4}\right)$

$\lim_{x\to0}\left(\frac{x^2\cos\left(x\right)}{\sin^2\left(\frac{1}{2}x\right)}\right)$

$\lim_{x\to\infty}\left(\frac{3e^{x-2}}{x^2+6x}\right)$

$\left(3x^2+\frac{2}{3}\right)^3$