Mathematics
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    (x-2)+(x+2)+x/2+2x=45
    31*56
    (sqrt(472-57.6)-2)/3
    (sqrt(472-52.8)-2)/3
    sqrt(472-52.8)-2
    409600×0.8
    102400×0.8
    1000000+800000+640000+512000+409600
    12800×0.8
    640000-128000
    160000×0.8
    1000000×0.2
    20×0.8
    1000000×10%
    17x∧2-32x+15=0
    4096:2160
    (-3.6)^2-3.6*2-3
    27761.17= 10549.26+8807.82+ 2992.78+ 2986.07+2160.99+c
    27414.83= 9869.36+9047.98+ 2992.78+ 3003.44+2185.78+c
    z<38%(1.7887*12641.23+0.575342*12641.23-3295.57+1172.39)-(0.009679*12641.23+755.3709+0.391781*12641.23-2197.86+0.057149*12641.23+626.04)

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