(x-13118213.81+505000-1547.52)*0.75+18501.61=0.00971x
    (x-13118213.81+505000-1547.52)*0.75+18501.61=0.00971x
    (x-13118213.81+505000-1547.52)*0.75+18501.61=0.971x
    26.5(x-4.5)=31.8
    26.5(x-4.5)=31.8
    x*0.13*1.06=1050000
    （x-13118213.81+505000-1547.52）*0.75+18501.61=0.971x
    100（1+x）²=196
    (x-13118213.81+505000-1547.25)*0.75+18501.61=0.00971x
    x/1.13*1.06=1050000
    arctanx×arctan1/x
    100（1+x）²=196
    100（1+x）²=196
    540/X*3=1710/3X
    (7-3b)²+6b(7-3b)+9b²
    （x-10）÷10-10% = （1.1x-12）÷12
    (x-13118213.81+505000-1547.25-0.02x)*0.75+0.02*0.25x=0.00971x
    40x+0.5×40×（11-X）=360
    116.37=0.6875/(1+x)^41+100/(1+x)^41
    x∧5＋3x∧3＋5x∧2＋7x＋11＝0

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