how increase or decrease an attribute value inside IF

I wanted to do this
{if answer=correct: @inc score 10}
{if answer=wrong: @dec score 5}

but the it only prints it as text not as a code

It already happened to me, we had another tread on the topic just a few days ago. There's a way, but it's way too complicated so in the end I had rather changed the game mechanic.

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