$$\int ex\cdot\left(2x^2+1\right)dx$$

$$2x^3+6x-2$$

$$\frac{16x^8-16xy^8}{2x^2+2y^2}$$

$$3x^{3\:}+\:13x^2\:\:-\:13x\:+\:2\:.3x-2$$

$$\frac{d^{15}}{dx^{15}}\left(-5sin\left(x\right)\right)$$

$$4x^2-13x+10$$

$$\frac{2}{5}x-8=12$$