$$16x^8+24x^4y^2+49y^4-9x^4y^2$$

$$sin^2\theta\:\cdot\:\:csc^2\theta\:-sin^2\theta\:=cos^2\theta\:$$

$$14x\:+\:9=22x+1$$

$$z^4-2z^2+1$$

$$2m^2+24m+36$$

$$\frac{d}{dx}x^2+xy+2y^2=28$$

$$\left(3x^3\right)\left(-2y^3x^3\right)\left(-5y^{-3}x^4\right)$$