$$cos\left(x\right)\:=\:\sqrt{2}\:-\:cos\left(x\right)$$

$$\left(3x-5\right)\left(3x+5\right)\left(9x^2-9x-10\right)$$

$$\int\:\frac{9x^2-25x-10}{x^3-4x^2-5x}\:dx$$

$$\left(a+b+1\right)^x\left(a+b-10\right)$$

$$\frac{14\left(2\right)+19\left(3\right)+x}{6}$$

$$\frac{dy}{dx}=\left(2\cos\left(x\right)\right)\left(\ln\left(y\right)\right)$$

$$\lim_{x\to0}\left(\frac{x^3+2}{x^3+x+1}\right)^{x^2}$$