$$x\frac{\sqrt{x^2+9}}{x^2+5}$$

$$\left(a\:+\:4\right)\:\left(a\:-\:2\right)\:$$

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

$$\frac{1}{m+n}+\frac{m}{n^2-m^3}$$

$$4+-5+-14$$

$$y\left(y+\sin\left(x\right)\right)\frac{dy}{dx}$$

$$\int\frac{x-3}{x^2+4x-5}dx$$