It's *not* a pearoast! It's completey different!
I changed the ∪ to a ∩.

From the
Maths challenge. See all
31 entries (closed)
(
MrCanoehead Marzipaaaaaaaaaaaaaaaaaaaaan!,
Mon 29 Dec 2014, 12:07,
archived)
Haha :)
(
Frogbeat,
Mon 29 Dec 2014, 12:11,
archived)
Genuine guffaws
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WiggZ,
Mon 29 Dec 2014, 12:17,
archived)
Brilliant
(
philbo baggins,
Tue 30 Dec 2014, 17:23,
archived)