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    x^2+6x-42=0
    (2z^3+9z^2+z)/6=e^z
    X^3-(137.07-2.1275×(-15))X^2-3777×78.56^2 = 0
    X^3-(137.07-2.1275×(-15))X^2-3777×77.82^2 = 0
    X^3-(137.07-2.1275×(5))X^2-3777×77.82^2 = 0
    X^3-(137.07-2.1275×(10))X^2-3777×77.82^2 = 0
    X^3-(137.07-2.1275×(-10))X^2-3777×78.56^2 = 0
    X^3-(176.05-2.1275×(-10))X^2-3256.77×78.56^2 = 0
    X^3-(176.05-2.1275×(10))X^2-3256.77×77.82^2 = 0
    225-x^2=400-(25-x^2)
    X^3-(176.05-2.1275×(5))X^2-3256.77×77.82^2 = 0
    X^3-(176.05-2.1275×(-15))X^2-3256.77×77.82^2 = 0
    X^3-(176.05-2.1275×(-15))X^2-3256.77×78.56^2 = 0
    X^3-(212.13-2.1275×(-15))X^2-2775×78.56^2 = 0
    X^3-(212.13-2.1275×(-10))X^2-2775×78.56^2 = 0
    2^x+7^x+x^2+x=-125
    X^3-(212.13-2.1275×(10))X^2-2775×77.82^2 = 0
    X^3-(212.13-2.1275×(-15))X^2-2775×77.82^2 = 0
    X^3-(212.13-2.1275×(5))X^2-2775×77.82^2 = 0
    (124.7-x)(50+2x)

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