6751*x∧4-268.44*x∧3+34.645*x∧2+0.6596*x-0.0639＝0
    x^5-x+1=0
    72*x-180*x+1800=360
    1.05^x＝1.16
    60x－x²＝864
    2000*（1＋x）*10*（1＋2x）＝60000
    6x－2x²＝4
    x²－3x＋1＝0
    xlnx-lnx＝x
    xe∧x-e∧x＝x
    3（22.5-1.5y）-2y=15
    5x²＋10x－2.2＝0
    [(40618.55+a+10000)-25000]*3% =618.55+a
    [(32046.23+a+843+8000)-25000-4215]*3% =260.22+a
    x^3-0.832x+0.31232x=0
    Ln sqrt(2)
    2-2b-6=0
    x^2+(x+4)^2=(2sqrt10)^2
    x^2+(x+4)^2=(2sqrt9)^2
    2/3y+16/21=6/7

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