The use of multisets in mathematics predates the name '' multiset '' by nearly 90 years .
The tuples -LRB- a , b -RRB- and -LRB- b , a -RRB- are not equal , and the tuples -LRB- a , a -RRB- and -LRB- a -RRB- are not equal either .
The tuples -LRB- a , b -RRB- and -LRB- b , a -RRB- are not equal , and the tuples -LRB- a , a -RRB- and -LRB- a -RRB- are not equal either .
これをもっとシンプルにしてください: The use of multisets in mathematics predates the name '' multiset '' by nearly 90 years . 出力: