$\left(2a^2+b^2\right)\left(4a^4-2a^2b^2+b^4\right)$
$24r+30$
$x^2-10x+28=7$
$3x^{-2}y^{-3}\cdot yx^4$
$1.5+3$
$\left(\frac{2}{5}x\:+\frac{1}{4}\right)^2$
$\frac{45z^{21}}{81z^{16}}$
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