353×400
    (85.7×0.25)/(〖0.25〗^2×4)
    353×250
    √((〖51.2〗^2+〖110.5〗^2-51.2×110.5)/1.5)
    (488×10^3)/9522
    (85.7×10^6×220)/223221027.5
    (246.8×10^3)/9522
    (0.5×22+2.4×19.1+2.5×22+6.6×23+20)×0.22-2×15×√0.22
    (0.5×22+2.4×19.1+2.5×22+20)×0.22-2×15×√0.22
    (0.5×22+2.4×19.1+2.5×22+6.6×23+20-10×(0.5+2.4+2.5+6.6))×0.22-2×0×√0.22+10×(0.5+2.4+2.5+6.6)
    (0.5×22+2.4×19.1+2.5×22+20-10×(0.5+2.4+2.5))×0.22-2×0×√0.22+10×(0.5+2.4+2.5)
    (0.5×22+2.4×19.1+2.5×22+20-10×(0.5+2.4+2.5))×0.33-2×0×√0.33+10×(0.5+2.4+2.5)
    (0.5×22+2.4×19.1+20-10×(0.5+2.4))×0.33-2×0×√0.33+10×(0.5+2.4)
    (0.5×22+2.4×19.1+20-10×(0.5+2.4))×0.36-2×0×√0.36+10×(0.5+2.4)
    (0.5×22+2.4×19.1+20-10×(0.5+2.4))×0.33-2×0×√0.33+10×(0.5+2.4)
    (0.5×22+0×19.1+20-10×0.5)×0.33-2×0×√0.33+10×0.5
    (0.5×22+0×19.1+20-10×0.5)×0.36-2×0×√0.36+10×0.5
    (20+0-10×0)×0.33-2×0×√0.33+10×0
    (20+0-10×0)×0.33-2×10×√0.33+10×0
    （3.07-3.07/1.13*0.13+0.05）/7.07

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