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X 3 x 1 x 4
X 3 x 1 x 4 pictures 5
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X 3 x 1 x 4
3 x 2 )+ x 4 x 1 )+ 10
1 x x 2 x 3 x 4 series
x 1 x 3 then x 4 1 x 4
x 12 1 x 3 x 4
6 x 3 )( x 1 )( x 4
y u003d( x 3 )( x 1 )( x 4
f x )u003d x x 3 )( x 1 )( x 4
x 3 x 1 x 4 4x 2 4x x 1 x
x 3 )( x 1 )( x 4 ) 0
x 3 )( x 1 )( x 4
