$$\left(s+8\right)\left(s-9\right)$$

$$\lim_{x\to\infty}\left(e^{2-2x-8x^2}\right)$$

$$\int4x\tan\left(x^2\right)dx$$

$$\frac{64a^3+b^9}{4a+b^2}$$

$$\frac{dx}{df}=4\left(x^2+1\right)x\left(\frac{\pi}{4}\right)=1$$

$$36x^2-18xy+4y^8$$

$$4^2\cdot4$$