$36+\left[\left(4\cdot5\right)+\frac{8}{4}\left(+9-12\right)\right]$

$3\left(2.001\right)^4-5$

$2x^2-2x=4$

$-x^2+2x-10$

$\int\left(x^2\:\left(x^3+5\right)^9\right)dx$

$\lim_{x\to1}\frac{\sqrt{x^2+\frac{1}{10}x-1}-\sqrt{x^3+\frac{1}{10}x-1}}{x-1}$

$\frac{\left(3x^4-10x^2+x-5\right)}{\left(x+2\right)}$