b1=2*1*8(2+12*1)
b1=224
b2=2*2*8(2+12*2)
b2=832
b3=2*3*8(2+12*3)
b3=1824
b1+b2+b3=2880
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b1=2*1*8(2+12*1)
b1=224
b2=2*2*8(2+12*2)
b2=832
b3=2*3*8(2+12*3)
b3=1824
b1+b2+b3=2880