$$-180x^2-39x-\left(-25x^2\right)$$

$$\frac{\left(x+2\right)\left(x-2\right)+10x+8}{\left(x+2\right)\left(x+4\right)}$$

$$\frac{d^3}{dx^3}-\frac{2}{x}$$

$$x\left(y\:-\:z\right)+\:\left(y-z\right)m$$

$$\int9\left(2x-8\right)e^{\left(2x^2-16x\right)}dx$$

$$80+20+51$$