$70.5+32.5$
$3x+5y-7y+x$
$\frac{3x\:4\:+\:2x\:3\:+\:12x\:2\:+\:8\:}{2x}$
$3x+5x^2+x\cdot2x$
$\left(9a^2-4\right)\left(3a+2\right)$
$100x^2+40x+4=0$
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