2.0×（28.49×22+2.34×10+28.86+4.79×20+4×4.2×2）+2×（2.7×54.6）+6.0×11.74+3.5×41.03=
    (（15.680+41.629）×1.9)/2
    237.5-209.5=
    30*（3/4）
    0.183+0.183*sin0.1
    3×3×3×3×3×2×2
    72.652-2×1.207×11
    （20+19.4×3.00+18.5×1.0+17.8×2.0）×0.687-2×0.829×11
    （20+19.4×3.00+18.7×1.0）×0.687-2×0.829×23
    （207+226+247+202+188+260+190+186+215+228+221+242+211+231+251+224+217+230+241+208+222+234+218+253+223+213+272+199+219+245）/30=
    （20+19.4×3.00+18.7×1.0）×0.564-2×0.751×23
    （20+19.4×3.00）×0.564-2×0.751×23
    （20+19.4×3.00）×0.704-2×0.839×8
    （20+19.4×3.00）×0.704-2×0.839×8
    [19*(250-404)^4+30*(350-404)^4+42*(450-404)^4+18*(550-404)^4]/[109*(9.22^4)]
    [19*{（250-404）^2}+30*{（350-404）^2}+42*{（450-404）^2}+18*{（550-404）^2}]^（1/2）
    0.184-0.183-0.183*sin(0.184)
    0.224-0.183-0.183*sin(0.224)
    0.184-0.183*sin(0.184)
    [19*(250-404)^3+30*(350-404)^3+42*(450-404)^3+18*(550-404)^3]/[109*(9.22^3)]

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