56+78
    20×0.7-2×10×0.84
    20×1.6-2×10×0.84
    280.67×6.6-1/2×6.02×0.7×6.62-1/6×18×0.7×6.63
    (8.41×0.7)/2×（2/3×0.7）+(（-36.9-1.64）×4.1)/2×[2/3×4.1×(-2×36.9-1.64)/(-36.9-1.64)+0.7] -1.64x（x/2+4.8）+(10.89x^2)/2（2/3 x+4.8）=126.77x(x/2+4.8)+(58.27x^2)/2(2/3 x+4.8)
    (8.41×0.7)/2×（2/3×0.7）+(（-36.9-1.64）×4.1)/2×[2/3×4.1×(-2×36.9-1.64)/(-36.9-1.64)+0.7] -1.64x（x/2+4.8）+(4.42x^2)/2（2/3 x+4.8）=126.77x(x/2+4.8)+(23.62x^2)/2(2/3 x+4.8)
    (8.41×0.7)/2×（2/3×0.7）+(（-36.9-1.64）×4.1)/2×[2/3×4.1×(-2×36.9-1.64)/(-36.9-1.64)+0.7] -1.64x（x/2+4.8）+(2.04x^2)/2（2/3 x+4.8）=126.77x(x/2+4.8)+(10.93x^2)/2(2/3 x+4.8)
    (8.41×0.7)/2×（2/3×0.7）+(（-36.9-1.64）×4.1)/2×[2/3×4.1×(-2×36.9-1.64)/(-36.9-1.64)+0.7] -1.64x（x/2+4.8）+(4.41x^2)/2（2/3 x+4.8）=126.77x(x/2+4.8)+(23.62x^2)/2(2/3 x+4.8)
    (（0.4/10）^4*(0.28/10)
    （19.8*2.7+20*1+22*1.6+24*3.3）*4.6+2*24*2.14
    (20+18.0×0.7+19.4*3.4+19.2*0.8+19.8*4.1+20*1+22*1.6+24*3.3)*0.22-2*25*0.47
    (24*0.22)/2*（2/3*0.22）+(（36.67+59.55）*3.1)/2*[2/3*3.1*(2*36.67+59.55)/(36.67+59.55)+1.1]
    (20+18.0×0.7+19.4*3.4+19.2*0.8+19.8*1.4)*0.61-2*31*0.87
    (20+18.0×0.7+19.4*3.4+19.2*0.8+19.8*1.4)*0.61-2*54*0.87
    （19.8*2.7+20*1+22*1.6+24*5.3）*4.6+2*24*2.14
    (20+18.0×0.7+19.4*3.4+19.2*0.8+19.8*4.1+20*1+22*1.6+24*5.3)*0.22-2*25*0.47
    (20+18.0×0.7+19.4*3.4+19.2*0.8+19.8*4.1+20*1+22*1.6)*0.22-2*20*0.46
    (20+18.0×0.7+19.4*3.4+19.2*0.8+19.8*4.1+20*1+22*1.6)*0.33-2*20*0.58
    (20+18.0×0.7+19.4*3.4+19.2*0.8+19.8*4.1+20*1)*0.33-2*40*0.58
    (20+18.0×0.7+19.4*3.4+19.2*0.8+19.8*4.1+20*1)*0.52-2*40*0.72

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