30.472*41^2 - 781.76*41+ 3476.1
    1.28*41^3 - 48.251*41^2 + 525.29*41- 1263
    -0.0004*40^6 + 0.0421*40^5 - 1.8629*40^4 + 38.863*40^3 - 383.73*40^2 + 1573.7*40 - 1766
    -0.0004*41^6 + 0.0421*41^5 - 1.8629*41^4 + 38.863*41^3 - 383.73*41^2 + 1573.7*41 - 1766
    -232+101.955/1.12+101.955/(1.12^2)+101.955/(1.12^3)
    -485000+60000+135600/1.11+135600/1.11^2+135600/1.11^3+135600/1.11^4+162200/1.11^5
    -1/（2/3）=
    (4√2-4)^3
    -485000+143200/(1+11%)+143200/((1+11%)^2)+143200/((1+11%)^3)+143200/((1+11%)^4)+178200/((1+11%)^5)
    -485000+181200/(1+11%)+181200/((1+11%)^2)+181200/((1+11%)^3)+181200/((1+11%)^4)+216200/((1+11%)^5)
    2*π*19*90/360
    2*3.14*19*90/360
    2π19*360/90
    2π19*90/360
    2π19*6/360
    -16√3+6√2
    1683.83*（sin0.42*3.14）＾3/3.14=
    1683.83*（sin0.42*3.14）＾3/3.14+379.89*（sin0.42*3.14+sin0.41*3.14）/3.14=
    4/3*4/3*4/3-1/2*4/3*4/3-4*4/3+2
    -2100000+1500000/1.15+750000/[(1.15)^2]+600000/[(1.15)^3]

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