Ask AI: 1+4=5 & 2+5=12 & 3+6=21& 5+8=?

This sequence seems to follow a pattern: 1+4=5: The difference between the second number and first number is 3 (4-1), and this difference is multiplied by the first number: 1*3=3, then adding 2 gives the result 3+2=5. 2+5=12: The difference between the second number and first number is 3 (5-2), and this difference is multiplied by the first number: 2*3=6, then adding 6 gives the result 6+6=12. 3+6=21: The difference between the second number and first number is 3 (6-3), and this difference is multiplied by the first number: 3*3=9, then adding 12 gives the result 9+12=21. Following this pattern, for 5+8: The difference between the second number and first number is 3 (8-5), and this difference is multiplied by the first number: 5*3=15, then adding 18 gives the result 15+18=33. So, 5+8=33.