$3m\left(2a-b\right)-2a+b$

$\int\:\left(x+3\right)^2\left(3-x\right)^7dx$

$\left(40f^c-30g^2\right)^2$

$\frac{dy}{dx}=\frac{y+1}{x^3}$

$\frac{2x^4-4x^3+8x^2-12x}{x}$

$\int_{-3}^{\infty}\left(e^{-x}\right)dx$

$\lim_{x\to\infty}\left(\frac{\sqrt{x}-7x+2\sqrt[5]{x^2}}{2x+8x^{\frac{2}{3}}-\sqrt[3]{x}}\right)$