$\lim_{t\to\infty}\left(\frac{-2\sqrt{2}-2}{e^{\sqrt{t}}}\right)$

$\int\frac{x^2+20x-4}{\left(x-2\right)\left(x^2+4\right)}dx$

$\int x\sqrt{1+4x^2}dx$

$\left(\frac{1}{2x}+\frac{3}{4y}\right)^2$

$\left(\frac{2a^2b}{a}\right)^3$

$-2x<14$

$\left(4^{-x}\right)\left(4^x\right)$