Equation of Line: y=3.0x-1.0    (l1)
Equation of Line: y=3.0x-1.0    (l2)
Equation of Line: y=3.0x+0.5    (l3)
Equation of Line: y=1.5x-2.0    (l4)
Equation of Line: x=-1.0        (l5)
Equation of Line: x=1.0         (l6)

RESULTS: equals(=), parallel(||), intersects(x)

l1 = l1? true
l1 || l1? false
l1 x l1? false

l1 = l2? true
l1 || l2? false
l1 x l2? false

l1 = l3? false
l1 || l3? true
l1 x l3? false

l1 = l4? false
l1 || l4? false
l1 x l4? true

l1 = l5? false
l1 || l5? false
l1 x l5? true

l5 = l5? true
l5 || l5? false
l5 x l5? false

l5 = l6? false
l5 || l6? true
l5 x l6? false
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