$4x+3-2x+6$
$\left(\frac{4}{7}a^2b-5b^2\right)^2$
$n^3-2n^2+\frac{1}{n^2}$
$y^3-5y^2+7y-3$
$2\log\left(\frac{x}{3}+10\right)=4$
$x^2+7+12$
$\left(\:\frac{3}{4}\:+\:x^3\right)^2$
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