$4-7-8+1$

$\int\frac{2x+1}{2x^3+x^2}dx$

$\int_{-1}^1\left(3x^2-2x\right)dx$

$\frac{dy}{dx}+\frac{y}{\left(200+x\right)}=\frac{\left(1+cos\left(t\right)\right)}{100}$

$\lim_{x\to0}\left(\frac{7x^2+2x-3}{x^2+2x-3}\right)$

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

$\frac{3x^3+6x^2-x+2}{x+1}$