$$f\left(x\right)=x^{3-12X-3}$$

$$\frac{1}{2}\cos\cos\left(4x\right)$$

$$\lim_{x\to-5}\left(\frac{10x^2+50x}{x^2-25}\right)$$

$$8\cdot\left|\left(-5\right)-\left(-9\right)+6-10\right|$$

$$-4375\cdot0$$

$$36x^6-108x^3x+81^2$$

$$\left(-1\right)\left(2x^3\right)$$