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

$$\sqrt{75qr^3}$$

$$\frac{2x^2+7x-15}{x+5}$$

$$\lim_{x\to0}\frac{\left(4x-3x\right)}{x}$$

$$-\left(-8\right)+\left(-33\right)-7+21$$

$$x+y\cdot x=x+yx$$

$$\frac{b^2-4b-12}{\:b+2}$$