e^2/4
    (19/14-4/7-3/10)*70
    3/11*14+19*3/11
    16/5*11/4-5/12*3.2+25/6*16/5-3/2*16/5
    (7/6+2/5+7/15)*30
    (7/6+2/5+7/15)*30
    6/7*8/3+6/7*13/3
    37/7/15+2+1/7*27-43*15/7
    (1+5/14-4/7-3/10)*70
    7/9*32-14*7/9
    2+3/7*2+1/2+(10/3)/(17/7)+17/7*1+1/6
    （11/14+3/7+13/21）*42
    3/11*14+19*3/11
    5*(4/3+2/7)-2*(1/3-1/10)+6*(3/7+3/10)
    5*(4/3+2/7)-2*(1/3-1/10)+6*(3/7+3/10)
    5*(4/3+2/7)-2*(1/3-1/10)+6*(3/7+3/10)
    (2+2/5+5/9+11/5)+(3+2/9-3/5-16/9)
    2/3+3/7+1/3+4/7
    3*(3/5+8/7)-2*(2/3+5/7)+4*(1/3-1/5)
    3*(3/5+8/7)-2*(2/3+5/7)+4*(1/3-1/5)

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