$$\frac{1}{y}dy=\frac{-x}{x^2-9}dx$$

$$36x^2-12x+1$$

$$\frac{x^4+3x^2-8-2}{x-2}$$

$$cos\cdot\csc\left(1\right).\tan\left(1\right)$$

$$7\cdot\left(-8\right)\cdot12$$

$$\int9e^{x^2}xdx$$