$$\frac{-9x^3+6x^2-12x}{-3x}$$

$$\int\frac{1}{16}x^2\cdot\sin\left(x\right)dx$$

$$y^2\frac{dy}{dx}+2xy^3=6x$$

$$y\left(x^2+1\right)dy=xdx$$

$$\left(-4m^{2}n^{3}\right)\left(-3m^{2}n^{2}\right)$$

$$4\cdot\left(x+3\right)\ge-3\cdot\left(x-5\right)-1$$

$$4n^42n^{-3}$$