10x{[10+14)/6}-1}
While this may not call for guessing what your question is, you have stated an expression that is very vague. 10x might mean 10 times "what follows," or 10x.
I'm certainly not going to guess what it means since you're the one who needs to clearly state the math problem that you need help with. Furthermore, there's
a missing parenthesis, one too may "curly brackets," and a missing closed bracket.
I'd advise you to fix it, repost it, and make it right. Also, don't you think you need to at least state what's to be be done to the expression?