$$\int x^5\sqrt[2]{13+x^6}dx$$

$$\sqrt{\left(3+\sqrt{2}\right)}\cdot\sqrt{\left(3-\sqrt{2}\right)}$$

$$20a^3-18a^2+12a$$

$$\frac{d^2f}{dxdy}\left(\ln\sqrt{3x^3ye^x+2xye^y}\right)$$

$$2\left(x-2\right)=4\left(2x-7\right)$$

$$\left(8-7\right)\cdot8+8$$