$$f\left(x\right)=\left(6x^2-7x+4\right)^2$$

$$cot\left(x\right)sin\left(2x\right)=2\left(1-sin^2\left(x\right)\right)$$

$$20x^3-34x^2$$

$$21,05-23,7$$

$$\frac{dx}{dz}=\frac{z^9}{2+z^{10}}$$

$$\frac{dy}{dx}\left(x^2+xy^2+y^3=10\right)$$

$$x^2+7x-12$$