$$5x^4y-80x^4$$

$$\left(y-\sqrt{1+y^2}\right)y'=\left(1+y^2\right)\left(1+x^2\right)^{\frac{3}{2}}$$

$$3\frac{5}{9}-4\frac{1}{4}+2\frac{1}{6}-3\frac{1}{3}$$

$$1-\sin^2$$

$$x^2>2x-1$$

$$\frac{\cot\left(y\right)}{\csc\left(y\right)}$$

$$\left(6x^2+3y^3\right)\left(6x^2-3y^3\right)$$