$16a^2+20a$
$\left(\sqrt{2}e^x\right)^2$
$\left(-68\right)\left(0.5\right)$
$\left(4m+9\right)^3$
$\left(2\right)\left(2+4\right)$
$-x-4x+21<0$
$5z\cdot2z$
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