(0.36×14.3×785000+1.25×360×25132)/(1.7×14.3×785000+3×360×25132)
    arccos0.934226
    arccos0.86971
    arccos0.8697151385067328704781991401296068119374
    764.27×5.23-1/2×0.52×1.6×5.23^2-1/6×24×1.6×5.23^3
    171.09×5.23-1/2×0.52×1.6×5.23^2-1/6×24×1.6×5.23^3
    171.09×13.56-1/2×0.52×1.6×13.56^2-1/6×24×1.6×13.56^3
    (20+18.0×1.6+19.2*2.4+19.8*5.2+20*2.1+22*0.9+24*2.8)*0.22-2*20*0.47
    (20+18.0×1.6+19.2*2.4+19.8*5.2+20*2.1+22*0.9+24*2.8)*0.22-2*22*0.47
    （19.8*2.9+20*2.1+22*0.9+24*2.8）*4.6+2*22*2.14
    (22*0.22)/2*（2/3*0.22）+(（38.72 +61.60）*3.4)/2*[2/3*3.4*(2*38.72 +61.60)/(38.72+61.60)+1.1]
    （19.8*2.9+20*2.1）*4.6+2*22*2.14
    -0.195917/(0.00024+0.195917)(0.00076-2.4*-0.195917)
    (20+18.0×1.6+19.2*2.4+19.8*5.2+20*2.1+22*0.9+24*3.1)*0.22-2*25*0.47
    （19.8*2.9+20*2.1+22*0.9+24*3.1）*4.6+2*22*2.14
    (22*0.22)/2*（2/3*0.22）+(（38.72+61.60）*3.4)/2*[2/3*3.4*(2*38.72+61.60)/(38.72+61.60)+1.1]
    （19.8*2.9+20*2.1+22*0.9+24*5.3）*4.6+2*22*2.14
    (20+18.0×1.6+19.2*2.4+19.8*5.2+20*2.1+22*0.9+24*5.3)*0.22-2*25*0.47
    (20+18.0×1.6+19.2*2.4+19.8*5.2+20*2.1+22*0.9)*0.22-2*20*0.46
    2÷3×14.3×502400×400×（sin（0.35π））^3÷3.14+360×25132×334×(sin（0.35π）+sin(0.55π))÷3.14

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