Does experience multipliers stack?

[CrimsonTider]

So I been trying to lvl up and I'm wondering if exp multipliers stack... If I counted up correctly and they do stack then x17 exp should be possible.
X2 raging set
X2 elite valinetine set
X3 Zeke
X3 daily blessing
X5 exp elixer (have to activate before accepting daily blessing I THINK)
X2 week long elixer

2+2+3+3+5+2=17 if it works...

Question from a couple weeks back.

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