<s>[INST] What's the solution to this puzzle? I saw this on Instagram with no solution and was wondering what the answer is.  I got $33$.
$$1+4=5$$
$$2+5=12$$
$$3+6=21$$
$$8+11=?$$
 [/INST] 96
For each line add the two numbers and store it in D. Add D to the C from the previous step.
A+B=C     D
1+4=5     5   (4+1 gives 5)       
2+5=12    7   (5+2 is 7. Add 7 to 5 = 12 from previous step)
3+6=21    9   (6+3 is 9. Add 9 to 12 = 21 from previous step)
4+7=32   11   (4+7 is 11. Add 11 to 21 = 32 from previous step)
5+8=45   13 
6+9=60   15 
7+10=77  17
8+11=96  19

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