$2a^2+a=15$
$3.26d+9.75d\:-\:2.65$
$\frac{x^2+5x+6}{x^2-3}$
$a^4+a^2b^2+\frac{b^4}{4}$
$m^4+3m^2-10$
$\left(3x^2-4x-5\right)+\left(5x^2-3x+2\right)$
$\frac{dy}{dx}=\:3e^{5x}$
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