What does this mean

Question

this phrase doesn't add up to me.
(x++x+-x)

Answer 1

(x++ x + -x )invalid statement
after x++ it requires operator
a+b here a and b are operands and + is operator

Answer 2

hmm it is a brain teaser for a promo code for a website if I can break the code then I get a discount haha. i thought maybe it was computer code for something. based on the x++ and x+-. maybe I'm wrong?