$$39^2$$

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

$$2-3\cdot\left(-2+10-4\cdot0.66-8\right)-2$$

$$x2+x+4x+4$$

$$\lim_{x\to\infty}\left(\ln\left(n\right)\right)^2$$

$$\int xe^{\frac{2x}{3}}dx$$

$$\cos\left(\frac{5\pi}{4}+\frac{2\pi}{3}\right)$$