$$\int e^{-2x}\cos^7\left(e^{-2x}\right)\sin\left(e^{-2x}\right)dx$$

$$x^2+x+9$$

$$x\le\:\frac{3\left(-2x+3\right)}{8}-\frac{5\left(1-x\right)}{6}$$

$$5+y=-8$$

$$taylor\:3x^2-5x,\:3$$

$$5a-3b+2a+7b-4a-4b$$

$$4\cos\left(x\right)+3=6$$