x²－300x+14400＝0
    1300+X-(1300+X)*0.0036=2524.5
    4.9x^2+x=10
    3000(1-x)(1-x)=2430
    88.22= 0.6875/(1+x)^41+100/(1+x)^41
    1350+X-（1350+X）×0.0036=2524.5
     9(6-M)/2-9*27/2/2=0.5*99/8
    243/4-54+9M=99/8
    X+0.0036×X=1330.22
    (60-5x)(4+x)=300
    x*1.1*3.45=4.19
    99/8-9*(6-M)/2=99/16
    （x+2）:x:0.25=4x
    x*1.1*3.79=2.35
    X^3-46.6813×350^2-（324.95-3.46×0.0001×350^2）×X^2=0
    X^3-46.6813×300^2-（324.95-3.46×0.0001×300^2）×X^2=0
    X^3-46.6813×250^2-（324.95-3.46×0.0001×250^2）×X^2=0
    X^3-46.6813×200^2-（324.95-3.46×0.0001×200^2）×X^2=0
    X^3-46.6813×150^2-（324.95-3.46×0.0001×150^2）×X^2=0
    X^3-46.6813×100^2-（324.95-3.46×0.0001×100^2）×X^2=0

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