5m Zen
If the lines x 1 2
If the lines x 1 2 pictures 5
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If the lines
If the lines x 1 2
if the lines x 1 /- 3 y 2 lambda
if the lines x 1 y 2 z 3 are concurrent
if the lines 1 x 3 y 2 2 alpha
if the lines x 1 /- 3 y 2 /- 2k
if the lines x 1 2 y 2 3 za 4
if the lines x 1 2 y /- 1 z 2
if the lines x 1 2 y 1 1
if the lines x 1 /- 2 y 4 3p
if the lines x 1 2
if the lines x 1 2 y 1 3
