150t=30000000
    150t=3000000000
    (18×1.1+17×10.8)/11.9
    (18×1.1+17×11+19.4×4.7+19.1×3+18.5×4.8+20.3×3.9)/28.5
    1.25×1.1×1072.21
    3(x+1)
    1+0.75×0.309-√((1+0.75×0.309)^2-0.5-0.625×0.309)
    804.2×12=
    1.25×1.1×1072.21=
    2/3×14.3×(500×sin(π×0.320))^3+360×8042×(500-50)×(sin(π×0.320)+sin(π×0.610))/π
    1.25-2×0.320=
    1+0.75×0.258-√((1+0.75×0.258)^2-0.5-0.625×0.258)=
    (360×8042)/(14.3×π/4×〖1000〗^2 )
    804.2*10
    2/3×14.3×(500×sin(π×0.324))^3+360×9650×(500-50)×(sin(π×0.324)+sin(π×0.602))/π
    1.25-2×0.324=
    1+0.75×0.309-√((1+0.75×0.309)^2-0.5-0.625×0.309)=
    (360×9650)/(14.3×π/4×〖1000〗^2 )
    804.2×12
    2/3×14.3×(500×sin(π×0.331))^3+360×12867×(500-50)×(sin(π×0.331)+sin(π×0.588))/π

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