sin（π*x）+sin(1.25*π-2*π*x)+3.03*π*（sin（π*x））^3=12345.94*π
    tanx-x=9.4241
    cosx=0
    6xcosx=0
    0.4x^2+1.35x^1.5+1.208x=8.38
    0.2025x^2+1.25x-0.81=0
    ex=4-xx
    7.834*x^(0.2)+x-6.6=0
    3xxxx-8xxx+4=0
    7.834*x^(0.2)+x-18=0
    0.04x^2+x=10000
    arctanW+arctan0.25W＝39
    0.04x^2+x^2=10000
    2*1.68^(-t/30)-2+2
    （x-1）*(x-0.00674)+(4+0.00674)x-6*0.00674+1=0
    x^(-10)+x^(-7)+x^(-3)=0.15
    46672.66x^5-0.5x-0.6=0
    x＋5/－13＝2
    1330x+30x^3=5880
    10x^2-9x+2=0

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