Mathematics
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    6300×2-2×650
    63000×2-2×650
    6900×9-9×650
    45/60=
    54000-4×650-1000×3-5×6000
    26500+20000+24900
    54000-10×650-14×1500
    12450×2
    (10000+1)(20000+1)/10000
    0.31809*50
    0.385*50
    0.758*50
    61.77*0.3
    61.77*0.7
    1.2354*50
    4*72.612957/10
    sqrt(100-1)+sqrt(100-4)+sqrt(100-9)+sqrt(100-16)+sqrt(100-25)+sqrt(100-36)+sqrt(100-49)+sqrt(100-64)+sqrt(100-81)
    1235400-770*620
    50*770
    370*80

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