$$\left|1+\left(6-9\right)\right|-\left(8-12\right)$$

$$\frac{dy}{dx}=\left(z-1\right)^2$$

$$\frac{\left(sec\left(y\right)-tan\left(y\right)\right)\left(sec\left(y\right)+tan\left(y\right)\right)}{sec\left(y\right)}=cos\:y$$

$$\frac{x^3+8x^2-5x+10}{x-2}$$

$$\int\left(2x^{2}-4x\right)^{6}\left(x-1\right)dx$$

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