5m Zen
X5 x4 x
X5 x4 x pictures 5
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X5 x4
X5 x4 x
x5 x4 x3 x2 x
x5 x4 x3 x2 x 0
x5 x4 x3 x2 x 1
x5 x4 x3 x2 x 1 0
x x2 x3 x4 x5 x6
x4 x 1 4 x5
factorise x5+x4-x-1
x5 x4 x 1 0
x5 x4 x
x5 x4 x 1
