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Regex is like ((AND|OR)([!=><]+)(.*))+
Input is like $check = "AND=>1536463OR<foobarOR=5";

AND!==!<!>>!!LKJKJIOJJ182873KLJJyuukjljkOR!<><><><><=!Blah
OR==!=!Hmm, could this be right?AND>>>>>>>this could be a problem

AND,=>,1536463
OR,<,foobar 
OR,=,5

$_ = "OR=5AND=>1536463OR<foORobarOR=5 ";
while (m/(AND|OR)                     #either AND or OR
...
# AND => 1536463
# OR < foORobar
# OR = 5

my $opers='=[><=!]?|[><!]=|<>|[<>]';
while (m/(AND|OR)($opers)((?:(?!(?:AND|OR)(?:$opers)).)+)/xgms) {
       print "$1 $2 $3\n";
}