$$-1\left(4+-7\right)$$

$$f\left(x\right)=\left(4x^2-5x-2\right)\left(3x^2+4x\right)$$

$$2x^4+7x^3+6x^2$$

$$\lim_{x\to0}\left(3x\right)^{2x}$$

$$\left(\frac{2}{5}a+\frac{3}{4}\right)^3$$

$$\left(x^{10}-10\right)\left(x^{10}-6\right)$$

$$169x^4-13x^2y^2+\frac{y^4}{4}$$