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B 2x 1 x 1
B 2x 1 x 1 pictures 5
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B 2x
B 2x 1 x 1
x 1 a 2x 1 b 2x 5 0
a x 1 )+ b x 1 )u003d 2x 4
b 4 2x 1 16 x 1 384
a 2 x 1 2x 1 b 2x 1 2x 1
b 2x 1 x 1
