$\sqrt{48n^5}$

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

$2x+20=-30$

$\int\frac{2x^3+10x}{\left(x^2+1\right)}dx$

$\int\frac{4}{\sqrt{\left(x^2-25\right)}}dx$

$\lim_{x\to0}\:\frac{\left(\:\:\frac{1}{x-1}\:+1\right)}{x}$

$100-7.\left(-9-\left(-3\right).9^2+5.^3-\left(-6\right)\right).\left(-4\right)$