Find the rule of Mathematical Olympiad Thank you. There's another 4, 5, 9, 14, (), ()

Find the rule of Mathematical Olympiad Thank you. There's another 4, 5, 9, 14, (), ()

The first parity sequence
2 4 6 () fill in 8
3 6 9 () fill in 12
So (8) (12)
4,5,9,14,（）,（）
This is a recursive sum sequence
9=4+5
14=5+9
（23）=14+9
（37）=23+14

If □ + △ + □ = 35, □ = △ + △ then △ = (), □ = ()

□=3△
□+△+□=7△=35
△=5、 □=15

The panel of calculator is composed of () and (). When calculating with calculator, if it only contains the same level operation, you can press () key

The panel of calculator is composed of (number) and (symbol). When calculating with calculator, if it only contains the same level operation, you can press the key (directly)