$$\left(-8x^5-6x^2-3\right)-\left(4x^2+2\right)$$

$$\int\left(\frac{15x-2x^2+9}{x^2+9\left(x-5\right)}\right)dx$$

$$\lim_{x\to\frac{\pi}{2}}\left(\frac{\cos\left(x\right)-\frac{1}{2}}{x-\frac{\pi}{3}}\right)$$

$$\int\left(x^3-2x\right)^3\left(3x^2-2\right)dx$$

$$x^2+16x+16=0$$

$$\left(\:4x^{3\:}+\:8x^2\:+\:3x\:+\:9\right)\:+\left(7x^3\:-\:3x^2\:+\:x\:+\:5\right)$$

$$\frac{3x^3+8x^2-7x+4}{x-1}$$