$\left(\frac{2}{b^2}\right)^3.\left(\frac{b^3}{4}\right)^2.\left(\frac{1}{b^2}\right)^2$

$\left(b^2-3x\right)^2$

$\int_{-\frac{163}{25}}^{\frac{163}{25}}\left(-\frac{6}{25}x^2\right)dx$

$\left(\frac{6a}{n}\right)\left(-\frac{3}{n}\right)$

$\frac{x-3}{-2}=9+2x$

$\frac{dy}{dx}=x^{2y}$

$\lim_{t\to0}\left(\frac{t}{\sqrt{t+4}-2}\right)$