$$\:x^{\frac{5}{2}}+\:25x^4$$

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

$$\int_{-2}^2\left(\frac{1}{1+x^2}\right)dx$$

$$\int\frac{8x-2}{x^3-2x^2+x}dx$$

$$8\left(2x+2y\right)-4\left(3xy-\left(-5x\right)\right)$$

$$\frac{cos\left(2x\right)}{1-2\cdot sin\left(x\right)^2}$$

$$\int\frac{1}{\left(y-m\right)\left(y-n\right)}dx$$