1×(π×〖21.19〗^2)/4×310
    727.2/6
    454619196+251455
    1＋1
    1＋1
    1＋1
    (—33/2)÷(—52/1)
    13×(π×16^2)/4
    1.35×1.0×2×14.3×10^3×0.81
    √((1.8×1.8)/(0.9×0.9))
    1.116×324.5
    [〖1.8〗^2-(0.56+2×0.755)^2 ]/4
    0.7×1.0×1.43×10^3×1.18×0.755
    256.9/1.8
    1/2 (324.5+310)×0.45×1.8
    0.7×1.0×1.43×10^3×0.739
    0.739×294.6
    954.6/(1.8×1.8)
    954.6/(1.8×1.8)
    12×(π×16^2)/4

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