5m Zen
2 xy 1 3
2 xy 1 3 pictures 5
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2 xy 1 3
yx 1 3 * xy 3 2
x 1 xy 2 3
xy yz zx 1 2 3
4xy 2y 3 xy 1 )- 2
expand 1 3 2 3 3 xy u2212
xy 2 1 3 1 9 u2212
log xy 3 )u003d 1 2 logx logy
y 2 xy 1 3 0
1 2 xy )u003d 1 3 x y
2 xy 1 3
