18x%×361=3160
    3xx-12x+5=0
    xx−x−6=0
    xx-x+1-5=0
    -100+0.99n=1.65√0.0099n
    -100+0.99n=0.0165√99n
    -100+0.99n=0.0165√99n
    -100+0.99n=0.165√0.99n
    R*log(R/0.15)/log(10)=(9/5)*600*log(6000)/log(10)
    x^3=-1|2
    -100+0.99n=0.0165√0.99n
    0.052*sinx/cos(x-5)+0.01*(1+sinx)=0.0483
    R*log(10*R)/log(10)=(9/5)*600*log(6000)/log(10)
    -0.0002X+2.0283=0.0002X^2-0.0294X+3.11
    128（1＋x）²=608
    (1/25+1/20)x5
    （1/25+1/20）x5
    x×x-19÷3×x=1085÷39
    3x²+12x+8=0
    -3÷4×x×x+19÷4×x=4

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