5m Zen
X square 4 y square z square
X square 4 y square z square pictures 5
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X square 4 y square
X square 4 y square z square
x square 2 xy y square 4 z square
x square 4 y square 4 xy 9 z square
multiply x square 4 y square z square 2 xy
4 x square minus x square 4 y square z square
x square 4 y square z square
x square 4 y square z square 4 xy 4 yz 2 xz
x square 4 y square z square 4 xy
