$\sqrt{0.4}$
$\left(2x^2+4x-7\right)\left(x-3\right)$
$18.6+15.4+25.5$
$3\left(x+6\right)\ge4\left(2x-7\right)+6$
$\left(5m^3n^2+2m^2n^3\right)^2$
$\int_{-10}^25xdx$
$27n-9f$
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