$$3^2+3+3\left(2\right)$$

$$\frac{4}{3}x^2y-\frac{2}{5}x^3y^2z-\frac{6}{5}x^3y^2+\frac{2}{7}x^3y^2z^2$$

$$\int\frac{3}{2}e^{4x}\cdot x^3dx$$

$$380.50+95.125$$

$$\int\sqrt{4-25\:x^2}dx$$

$$\left(5x^4-\frac{25}{16}x^2\right)$$

$$\frac{d^2}{dx^2}\sec\left(x\right)^3$$