$\csc^2x-2=0$
$\left(4k-7h\right)^3$
$\lim_{x\to\infty}\left(\frac{53x^2+21x^4-16}{-x^4+3x}\right)$
$\left(6x-8\right)\left(6x+3\right)$
$\left(\frac{3}{xy^2}+\frac{x^2y}{3}\right)^2$
$\frac{5}{4}x+6+3x-4$
$\frac{1}{x^3-x}$
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