$$\left|7-6\right|+\left|6-7\right|-\left|8-7\right|$$

$$\frac{\sin\left(n\right)}{\cos\left(n\right)}+\frac{\cos\left(n\right)}{1+\sin\left(n\right)}=\tan\left(x\right)$$

$$\left(x^3+8\right)\left(x^3-1\right)$$

$$\frac{16x^8-16y^8}{3x-3y}$$

$$32x-14=-14x+32$$

$$\left(2a-1\right)\left(2a+2\right)$$

$$\int\sec\left(o\right)do$$