$\frac{2x+10}{x+3}\ge1$
$8x+1=-23$
$\left(9x^3-7y^5\right)^2$
$1020^2-1010^2$
$\frac{2cos2x}{sin2x}$
$\frac{9^2}{4}-ab+b^2$
$\int\left(\frac{3x}{1-2x^2}\right)dx$
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