$\sqrt{3}\csc\left(\theta\right)=2$

$2\left(5-4y\right)$

$\lim_{x\to\infty}\left(x^3\cdot\left(\frac{1}{x}-sin\left(\frac{1}{x}\right)\right)\right)$

$y=\left(6-x\right)^{-3}$

$\lim\:_{x\to\:0}\left(\left(4x^2-3\right)\cdot\:\left(7x^3+2x\right)\right)$

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

$21\cdot39$