40*22^3/12+2*0.00686*40^4+2*628.3*(8.49+11)^2
    (755.21*10^6/(1.23*10^8)-0.7*2.65)/(1/（4160.7*10^2)+383/(1.23*10^8))
    (5.62×4.3×0.5+6.62×5.4×0.5+7.72×6.5×0.5)×1+(5.62×1.54×0.5+6.62×2.64×0.5+7.72×3.74×0.5)×1
    (4.78×1.3×0.5+5.88×2×0.5+6.98×2.8×0.5)×1+(5.08×1.3×0.5+6.18×2×0.5+7.28×2.8×0.5)×1
    (1.4×1.6×0.5+2.22×2.8×0.5+3.04×4×0.5)×2+(1.4×4.3×0.5+2.22×5.4×0.5+3.04×6.5×0.5)×1
    (1.4×1.6×0.5+2.22×2.8×0.5+3.04×4×0.5)×2+(1.4×4.3×0.5+2.22×5.4×0.5+3.04×6.5×0.5)×1
    (1.5×1.6×0.5+2.4×2.8×0.5+3.4×4×0.5)×14+(1.5×4.3×0.5+2.4×5.4×0.5+3.4×6.5×0.5)×5
    (1.6×1.6×0.5+2.8×2.8×0.5+4×4×0.5)×12+(1.6×4.3×0.5+2.8×5.4×0.5+4×6.5×0.5)×7
    (1.6×1.6×0.5+2.8×2.8×0.5+4×4×0.5)×12+(1.6×4.3×0.5+2.8×5.4×0.5+4×6.5×0.5)×7
    (7.28+0.2)×(2.8+0.2)×0.1×1+(7.72+0.2)×(6.5+0.2)×0.1×1+(7.72+0.2)×(3.74+0.2)×0.1×1=
    (3.04+0.2)×(4+0.2)×0.1×2+(3.04+0.2)×(6.5+0.2)×0.1×1+(6.98+0.2)×(2.8+0.2)×0.1×1
    (4+0.2)×(4+0.2)×0.1×12+(4+0.2)×(6.5+0.2)×0.1×7+(3.4+0.2)×(4+0.2)×0.1×14+(3.4+0.2)×(6.5+0.2)×0.1×5
    （1+8%）∧0.5
    （1+8%）∧1.5
    2300*2000
    2300*6000
    692345:6000
    (4+5+26)÷8
    7*10^
    7e-4

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