It seems like you're trying to send me a message in Japanese! Breakdown:

* _15_: The number 15

* _ha_: Means "or"

* _yo_: Means "you"

* _: A nyoro mark, which is often used in informal or joking contexts

So, if I'm correct, your message roughly translates to: "1 + 1 = ? (Can you even do basic math?)". Am I right?