$$11m+12m-2m$$

$$\frac{\left(x-2\right)^3}{x^2}$$

$$10\sec^2\left(25\right)$$

$$\cos\left(x\right)^2\cdot\csc\left(x\right)+\frac{1}{\csc\left(x\right)}=\csc\left(x\right)$$

$$\sin^2x-cos^2x=1-2cos^2x$$

$$\left(a^{2m}+d^{2n}\right)\left(a^{2m}-d^{2n}\right)$$

$$\sqrt{3^{-2}}$$