1.1749^11
    （11243/1909.5）^-11
    （11243/1909.5）*-11
    5.3÷109.8
    3.4÷25
    14.6÷200
    0.045537×100%
    5÷109.8
    （5÷109.8）×100%
    3+4
    1-3/40-1/20
    (0.15×556.331×10^3×95×6)/(2×0.7×10×170^2 )
    (0.15×556.331×10^3)/(2×0.7×10×170)
    (0.15×556.331×10^3)/(2×0.7×10×170)
    (556.331×10^3)/(4×0.7×8×160)
    √(((6×372987×(100-20))/(1.22×2×0.7×10×(290-2×10)^2 ))^2+(372987/(2×0.7×10×(290-2×10) ))^2 )
    1-exp(-0.415)
    0/0
    1+1
    （1/5.51×10＾（-4））+（1/0.241×9.63×10＾（-3））

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