$3x-2y\cdot y+2x$

$\lim_{x\to+\infty}\left(\frac{2x^4-3x^3-2x+6}{5x^3-4x^2+x-1}\right)$

$\frac{dy}{dx}=5x^6y^2$

$\int\left(3x^{\frac{-1}{3}}-\frac{1}{\sqrt{x}}\right)dx$

$\lim_{x\to\infty}\left(\frac{4x^3-3x^2+2}{2x^3+7x-5}\right)$

$\int\:7x^5e^xdx$

$\frac{1}{25}+\frac{25}{36b^4}-\frac{b^2}{3}$