$ax+yb+ab+yx$
$\frac{cscx}{8}+\frac{cscx}{4}+\frac{cscx}{2}+cscx+ctgx$
$\left(\frac{2}{5}x-\frac{2}{3}\right)^2$
$4\left(x^2-3x+2\right)>0$
$\frac{x^2-1}{x^5-1}$
$\frac{10a^{2}b^{9}}{15a^{5}b^{9}}$
$\int x^2+8dx$
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