$4{\mathrm{\pi r}}^2$

${\mathrm{\pi r}}^2$

$\raisebox{1ex}{$4$}\!\left/ \!\raisebox{-1ex}{$2$}\right.{\mathrm{\pi r}}^2$

$4\mathrm{\pi r}$

$4{\mathrm{\pi r}}^2$

${\mathrm{\pi r}}^2$

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${\mathrm{\pi r}}^2$

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$4{\mathrm{\pi r}}^2$

${\mathrm{\pi r}}^2$

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$4\mathrm{\pi r}$

$4{\mathrm{\pi r}}^2$

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$4\mathrm{\pi r}$

$4{\mathrm{\pi r}}^2$

${\mathrm{\pi r}}^2$

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$4\mathrm{\pi r}$

$4{\mathrm{\pi r}}^2$

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