$$41x^2+364+564$$

$$3\cos^2\left(x\right)-\sin^2\left(x\right)=6\cos^2\left(x\right)-3$$

$$8x-2=5x+4$$

$$-20>4-4x$$

$$\int\sqrt{25-4x^2}\frac{5}{2}dx$$

$$\lim_{x\to0}\frac{2+sen\left(x\right)}{x}$$

$$\frac{d}{dx}\left(\ln e^5x\right)$$