1.9782×(2.2×40+6.8×65+4.5×80)
    (0.8-0.02×2)×(2.1-0.02×2)×4+(0.8-0.02×2)×(2.1-0.02×2)×3+(1.6-0.02×2)×(2.1-0.02×2)×4+(1.6-0.02×2)×(2.1-0.02×2)×(1.0-0.02×2)×(2.1-0.02×2)+(1.0-0.02×2)×(2.1-0.02×2)+(1.5-0.02×2)×(2.1-0.02×2)×5+(1.3-0.02×2)×(3.45-0.02×2)+(2.4-0.02×2)×(2.0-0.02×2)
    (2.1-0.02×2)×(2.85-0.02×2)×2+(2.1-0.02×2)×(1.95-0.02×2)×4+(1.55-0.02×2)×(3.45-0.02×2)×2
    (1.3-0.02×2)×(2.85-0.02×2)+(1.8-0.02×2)×(2.85-0.02×2)+(2.1-0.02×2)×(2.85-0.02×2)×6+(1.3-0.02×2)×(1.95-0.02×2)×2+(1.8-0.02×2)×(1.95-0.02×2)×2+(2.1-0.02×2)×(1.95-0.02×2)×19+(1.3-0.02×2)×(3.45-0.02×2)+(1.5-0.02×2)×(3.45-0.02×2)+(1.55-0.02×2)×(3.45-0.02×2)×2+(1.8-0.02×2)×(3.45-0.02×2)+(2.1-0.02×2)×(3.45-0.02×2)×2+(1.8-0.02×2)×(2.0-0.02×2)
    (0.8-0.02×2)+(2.4-0.02)
    (0.8-0.02×2)×(2.1-0.02)+(1.0-0.02×2)×(2.1-0.02)×14+(0.9-0.02×2)×(2.1-0.02)×8+(1.5-0.02×2)×2+(2.4-0.02×2)×(3.0-0.02)
    (0.8-0.02*2)*(2.1-0.02)+(1.0-0.02*2)*(2.1-0.02)*14+(0.9-0.02*2)*(2.1-0.02)*8+(1.5-0.02*2)*2+(2.4-0.02*2)*(3.0-0.02)
    1÷8-1÷12
    sec0
    1.9782×(2.2×40+6.8×65+4.5×80)
    arctan4-arctan10-arctan0.4-arctan0.2
    arctan0.4-arctan10-arctan0.4-arctan0.2
    arctan4
    1.9782×(2.2×40+6.8×65+4.0×80)
    1.9782×2.2×40+6.8×65+4.0×80
    1.9782×(2.2×40+6.8×65+4.9×80+1.1×130)+0.28×6200×0.31
    1.9782×2.2×40+6.8×65+4.9×80+1.1×130+0.28×6200×0.31
    0.9×(1.0×3.32×16.7+2×1.0×0.086×3.59×360)×4.1×10^5
    √((2300×2300)/410000)
    √(4520000/410000)

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