2024a^2-2044238a-2048286=0
    x^2-20x+48
    x*0.55*1.33=3.98
    1+X＝2
    500000X+2135.08/（1+X）^360＝2135.08
    x×70%+(160-x)×90%=160×85%
    0.7x+(160-0.9x)=136
    ex/lnx
    12x^3-53x^2+24x+62= 0
    1000/(x^2) +6*80/x+30=1.2*192
    t^2+((3/2)t-5)^2=(3-(3/2)t)^2
    20%*x+(1-x)*12%=14%
     (1-x)*8%+x*15.61%=14%
    1/2tanx
    （40.221+x）×1.95＝40.221+72.242-x
    （40.221+x）×1.75＝40.221+72.242-x
    （40.221+x）×1.55＝40.221+72.242-x
    （40.221+x）×1.35＝40.221+72.242-x
    （40.221+x）×1.15＝40.221+72.242-x
    x^2(x-3)=20240114

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