$\left(2+\sqrt{y}\right)\left(2-\sqrt{y}\right)ucuc$
$a+6a-2$
$70.4346943+\frac{-7363.6981}{90+273.15}+\left(0.006952085\cdot\:\left(90+273.15\right)\right)-9\cdot\:\:ln\left(90+273.15\right)$
$6+\left\{5-3+\left[4+9+\left(6+4-3\right)\right]\right\}$
$7-\left(-2\right)$
$\lim_{x\to a}\left(\frac{a^2-w^2}{a-w}\right)$
$\left|8^2-7^2\right|^2\cdot10^2-25$
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