$$\left(4x+8ab^2\right)^2$$

$$7.6+15$$

$$sec=\frac{29}{20}$$

$$32^{\circ}+90^{\circ}+32^{\circ}$$

$$6n^2-9n$$

$$x^2+2xy+y^2-2^2$$

$$\left(1+\cot\left(a\right)\right)\cdot\left(1-\cot\left(a\right)\right)+\csc^2\left(a\right)=2$$