X²－X=10^−14
    arctanw+arctan5w = 90
    arctanw+arctan2w = 90
    arctanw+arctan2w = 90
    (1+x∧2)∧1/2+x＝1/3
    y=e
    (1+x)∧1/2+x＝1/3
    49x^2-1260x+8100=0
    3*x=66
    x^2÷（1-2x）^2=5×10^-5.6
    1.25x+0.175x^2-0.7＝0
    8.8-x=4.4
    8.8-x=4.4
    x+cos2x-0.75=0
    x-0.5cosx-6=0
    0.21x^2+1.25x-0.84＝0
    ln(1+x)-x=0.577
    2∧c+㏒2c＝4
    2x-x^-2=0
    a+㏒2a＝4

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