$$\sin x\left(2\sin\left(x\right)-1\right)=0$$

$$\int xe^{122x}dx$$

$$\lim_{x\to-9}\left(\frac{x+3}{\left|x+3\right|}\right)$$

$$\left(-2-y\right)\left(-9-y\right)$$

$$6x^3-12x^2$$

$$9y'-9x+xy=0$$

$$-a^2-3a+5=6a+3$$