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

$\left(4mn^3+12\right)^2$

$\left(2z-5y+2\right)dx+\left(1-6y-5x\right)dy=0$

$\int\frac{1}{2x^2+7}dx$

$\int\frac{x^3+2x}{x^4+2x^2+3}dx$

$\int\left(3x+1\right)^3dx$

$\lim_{n\to\infty}\left(\frac{\log\left(1+\frac{1}{n}\right)}{\frac{1}{n}}\right)$