$\int x^{-\frac{4}{3}}dx$
$\left(6x+2y\right)\left(-x+3y\right)$
$70x+250\ge1200$
$x^2+14x+196$
$5x^2+10x^2-25x^2$
$\frac{9}{7}abx^3-5abx^3$
$9a+7-9a+3$
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