4x=91.1×(8.29-0.45)+742.55×(8.29-5.55)-266.92×(8.29-1.86)^2/6
    4x=91.1×(4-0.45)-89.6×(4-1.86)^2/6
    h/6+4=16
    a/9-4=-7
    6k+9=57
    0.2g+2=7
    e(-0.75*(sqrt(32/6sinx))^3*(5/12π-x)+e(-3*(sqrt(32/6sinx))^3*(5/12π+x)=2/3
    (w/6)-19=8
    w/6-19=8
    182.1+742.55+1233.99+1531.41+1505.33=[(18.9×h+20)×0.54-2×20.25×√0.54]×(h-1.86)÷2×4
    1-a10/1-a30＝1/12
    3w+7(3-w)=16
    182.1+742.55+1233.99+1531.41=[(18.9×h+20)×0.54-2×20.25×√0.54]×(h-1.86)÷2×4
    182.1+742.55+1233.99=[(18.9×h+20)×0.54-2×20.25×√0.54]×(h-1.86)÷2×4
    182.1+742.55=[(18.9×h+20)×0.54-2×20.25×√0.54]×(h-1.86)÷2×4
    182.1=[(18.9×h+20)×0.54-2×20.25×√0.54]×(h-1.86)÷2×4
    12.5*3/8+2.2+6.25*12.5+8/5
    {85-[-0.01*(1500-x)+100]}/85={80-[-0.01*(1000+x)+100]}/80
    12.5*3/8
    0.25q+0.1(10-q)=1.9

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