$\left(\frac{t-2}{4-2}\cdot\frac{t-2.5}{4-2.5}\right)$

$\int\frac{2x^2}{\sqrt{1-6x^3}}dx$

$\left(m^3+y^4\right)^2$

$\left(4x-9\right)\left(4x+12\right)$

$\lim_{t\to1}\left(\frac{3t^3+3}{4t^3-t+3}\right)$

$\frac{5}{x+2}+\frac{x+2}{\left(x+2\right)}$

$\int4x\sqrt{2x-x^2}dx$