$2y^3-7x^2=5$
$2x^2+5x=7$
$810x^2-4$
$23-\left(-2\right)$
$\int\frac{2x-1}{x^2-4x+4}dx$
$567,345-453,23$
$\frac{7.5-10}{5-10}$
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