$5r\:-2\:r\:-3$
$64m^3+125n^6$
$\left(2x-1\right)^2=49$
$\left(2a+b-3c+4\right)^2\:\:\left(6a+2b-3c\right)\:\:\left(a-b\right)$
$20\sin\left(b\right)^2+4\sin\left(b\right)-7=0$
$\frac{dy}{dx}=y^2+\frac{2y}{x}+\frac{2}{x^2}$
$\log x=\log6$
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