59/(1+0.1001)+59/(1+0.1001)^2+59/(1+0.1001)^3+59/(1+0.1001)^4+(1250+59)/(1+0.1001)^5=
    100000×((0.005×(1-cos(83/62500)))/cos(83/62500))/(tan(83/62500)-(83/62500))
    ((0.005×(1-cos(83/62500)))/cos(83/62500))/(tan(83/62500)-(83/62500))
    1+23124
    (194.28×8.29+336.9×4.148+130.502×1.063)-(2.84×2.3+351.77×1.04+204.2×9+106.24×6.2)=
    (194.28×8.29+336.9×4.148+130.502×1.063)-(2.84×2.349+351.77×1.04+204.2×9+106.24×6.2)=
    (194.28×8.29+336.87×4.148+130.502×1.063)-(2.84×2.349+351.77×1.04+204.2×9+106.24×6.2)=
    (194.28×8.29+336.87×4.148+130.502×1.063)-(2.84×2.349+351.775×1.043+204.2×9+106.24×6.2)=
    (194.3×8.4+336.87×4.12+129.36×1.05)-(2.84×2.32+ 351.69×1.03+204.2×8.98+106.24×6.18)=
    (111.31+197.19)/2×2.3=
    (111.31+197.19)/2×2.28=
    (44.01+69.47)/2×2.3=
    (2×111.31+197.19)/(3(111.31+197.19))×2.28=
    (2×27.06+29.82)/(3(27.06+29.82))×(4.8+4.1-8.8)+2.3=
    (2×27.06+29.82)/(3(27.06+29.82))×(4.8+4.1-8.8)+2.28=
    -2-1
    （2560-1000）/（3000-2560）
    arctan((5*12)/(47+3*22+5*(12/tan70)))
    (5*12)/(47+3*22+5*（12/tan70）)
    0.231*0.8*75*0.001*(180-67)

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