$$\left(2x+10\right)\:\left(2x-10\right)$$

$$3x^2-5x+9$$

$$\int\left(24x-24\right)\left(4x^2-8x+6\right)dx$$

$$5x=6.7$$

$$2x^2+26x+72$$

$$\lim_{x\to2}\left(\frac{\cos\left(x\right)}{1-\sin\left(x\right)}\right)$$

$$f\left(x\right)=\ln\left(3x^2-5x+2\right)$$