$$\sqrt{1+x^2}dy\:-\sqrt{1-y^2}dx=0$$

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

$$7\left(3\right)\left(-4\right)\left(2\right)\left(2\right)\left(2\right)$$

$$\left(\frac{2}{3}xy+\frac{1}{2}a^2b^3\right)^3$$

$$5\left(8h\right)$$

$$\frac{x-5}{5x+10}\cdot\frac{2x+4}{2x-10}$$

$$64\left(m+n\right)^3$$