x＋4÷x=3
    x＋4÷x=3
    x(104-x)=1183
    1/x²sin1/x
    x^3+6*x^2+18*x+20=0
    A1=268.875－π×(2.04/2)^2×12
    x^5－43.5*x^3+45.5*x=0
    3*x^2+22*x+10=0
    x^3+15x^2+50x+30
    2X^2-6x-3=0
    2X^2-6x-3=0
    2X^2-6x-3=0
    2X^2-6x-3=0
    0.507x(50+6.8x)-0.493x(40+8. 2x)=0
    x^3+4*x^2+3*x+2=0
    3.3x-1.2×4=11.4
    46*cos(X)+(sin(x)*sin(x)-cos(x)*cos(x))*(-7.211202495)-2*sin(x)*cos(x)*39.06863364=0
    46*cos(X)+(sin(x)*sin(x)-cos(x)*cos(x))*20.42065651-2*sin(x)*cos(x)*39.06863364=0
    X/20+X/30+X/42=3
    X/20+X/30+X/42=3

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