$\left(-5.683\right)\cdot8$
$b^2-z^2$
$2n+3m+2n$
$8^2-2\cdot4$
$5\:x\:=\:20$
$\int\frac{1}{2}n\cos\left(4n^2\right)dx$
$\left(4x^2-2\right)\left(4x^2+2\right)$
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