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What dose this operation do ?

can anyone show me what dose this operations do in mathematical methods plz

9th Jul 2017, 1:55 PM
mohammed jouhar u
mohammed jouhar  u - avatar
2 Respuestas
+ 3
I'm as stumped as you. Never seen an invisible operation before.
9th Jul 2017, 2:26 PM
Sapphire
0
@Sapphire Probably having trouble operating the site and probably meant to use the insert option
10th Jul 2017, 3:31 PM
Puzzles
Puzzles - avatar