$\frac{1}{2}y^{-2}+\frac{1}{2}^2$
$6.74\cdot1.98$
$\left(2x+3z\right)^{2}$
$2084-2622.07143$
$-3.3^2$
$-1-2.\left(-3\right)$
$1=x^2+16$
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