$$\left(-8\right)\cdot\left(-8\right)\cdot8$$

$$-\left|53\right|$$

$$\int\left(\frac{1}{2a-x^2}\right)dx$$

$$\frac{1}{sec\left(x\right)-1}+\frac{1}{sec\left(x\right)+1}=2\csc\left(x\right)\cot\left(x\right)$$

$$\left(-x^2\right)\left(2x^3+3\right)$$

$$\frac{d^2y}{dx^2}\left(\ln\left(\sqrt{x^2+y^2}\right)=a.\arctan\left(\frac{y}{x}\right)\right)$$