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(( 2 x )( x 7 x
(( 2 x )( x 7 x pictures 5
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(( 2 x )( x 7 x
x square 3 x 7 x 2 x 3
x 2 x 22 x 7
x 2 x 2 )( x 7 ) u003d 0
x 7 2 x x 14
x 2 )( x 4 )( x 7
x 7 x 2 x 4 x 2 1
x 1 )( x 2 )( x 7
x 2 x 3 x 7 3
2 x x 7 x
2 x )( x 7 )/( x 5 )( x 4 )u003d 1
