5m Zen
If line 2x
If line 2x pictures 5
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If line
If line 2x
if the line 2x y 3
if the line y 2x lambda
if the line 2x
if the line 3y 2x 3
if the line 2x root 6y 2
if the line 2x y k 0
if the line 2x y 3 0 is at a distance
if line 2x 7y 1 0
if line 2x by 1
if line 2x y k
