X/（1+9%）*9%=2113.48
    x＾4
    3∧x
    101.335+0.785×a-21.096×2=4485.99
    198.376+0.86×a-77.98×2=7558.10
    101.335+0.785×a-21.096×2=4532.78
    198.376+0.86×a-77.98×2=7485.92
    55=0.1Q²-2Q+15
    40x+52x=276
    x^5-2*x^4+1=0
    x^4-2*x^3+1=0
    x^3-2*x^2+1=0
    2(x+5)=50+212-2x
    2(x+5)=50+212-2x+88.4
    0.55*1.1*x=2.05
    (x-2)/2022+x/2023+(x+2)/2024=6
    3^x=2^32
    （38-22-x）（160+x/3*120）=3640
    x^x=2^32
    x*1.1*2.99=1.95

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