$$\left(-x+sin\left(\frac{\pi}{8}\right)\right)^2$$

$$\left(-\frac{1}{2}+7\right)^{-2}+105^0$$

$$\frac{x^5-x^4}{8gz^2}$$

$$2x^2\:+\:12x\:-\:16\:=0$$

$$\int_0^{\pi}\left(\left(1+\cos\left(9x\right)\right)^2\sin\left(9x\right)\right)dx$$

$$y^{'\:}+4y=8x$$

$$6-2-10\cdot15-18$$