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    10x*x+235x=9275
    x^-2
    350x-5*8000-20000=108000
    3400/r(1-1/(1+r)^16)+100000/(1+r)^16=105430
    (1.01)^x=2.08
    200+200-(200*0.75/0.5)=x
    5X+X÷5=52
    5X+X÷5
    x*x+35x=200
    11x-x²=32
    11x-x²=30
    a²-a-2=0
    (20-x)*(100+5x)+2000-1800=2020
    (20-x)*(100+10x)+2000-1800=2020
    (14-2x)*(100+10x)+1400=2020
    (14-x)*(100+5x)+1400=2020
    (14-x)(100+5x)+1400=2020
    (655-1677i)*(1+i)^12-655+75i=0
    (655-1677i)*(1+i)^18-655+75i=0
    (524-1677i)*(1+i)^15-524+75i=0

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