abs1
    -5^2
    (113.15/6+304.78/3) (16.5+4.17)^2
    34.06(16.5/2+4.17)*16.5+16.5/2 (682.35-34.06)((2*16.5)/3+4.17)
    22375828.80 / (1+0.4)
    17814602.16 / (1+0.4)
    349.5*24
    365 - (6*7)/4 - 2 - 3
    （0.5*(e^(1.6977)-e^(-1.6977))+sin(1.6977)）*（0.5*(e^(1.6977)+e^(-1.6977)-cos(1.6977))）*0.5
    （0.5*(e^(3.3072)-e^(-3.3072))+sin(3.3072)）*（0.5*(e^(3.3072)+e^(-3.3072)-cos(3.3072))）*0.5
    （0.5*(e^(3.3072)+e^(-3.3072))*0.5*(e^(3.3072)+e^(-3.3072))-cos(3.3072)*cos(3.3072)）*0.5
    （0.5*(e^(3.3072)-e^(-3.3072))*0.5*(e^(3.3072)-e^(-3.3072))+sin(3.3072)*sin(3.3072)）*0.5
    3592.86*10.9+428.27*1.08+374.36*23.14+494.41*19.24-1.25*(2527.54*6.43+1302.35*1.07)
    45/8.1
    1.04*2
     6 * 1.35
    3/2(52-44)*(51-44)+13*14+1/2(44-13)(44-13-1)
    3/2(52-44)*(51-44)+15*14+1/2(44-14)(44-14-1)
    3/2(52-44)*(51-44)+15*16+1/2(44-15)(44-15-1)
    3/2(52-43)*(51-43)+15*16+1/2(43-15)(43-15-1)

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