xx=5
    1.4351=2/r+6.28*r^2/7201
    11+2550+2550*x+5110*x+5110+22=2000000
    40%-X=1/20
    24*24+x=578
    0.5x＋2.25＝x-1
    0.5x＋2.25＝x+1
    acos(0.5)
    3x*x=cosx
    x*x=cosx
    2.46x/(1+1.46x)=0.0443
    2.46x/(1+1.46x)=0.0878
    2.46x/(1+1.46x)=0.1557
    2.46x/(1+1.46x)=0.2504
    2.46x/(1+1.46x)=0.3648
    2.46x/(1+1.46x)=0.4807
    2.46x/(1+1.46x)=0.5790
    2.46x/(1+1.46x)=0.6771
    2.46x/(1+1.46x)=0.7769
    2.46x/(1+1.46x)=0.86

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