Problem Z Flyff For Fame Ok Im Confused On How To Do My Math Homework And If "-" Means Subtract Or Oppisite The Problem Is -Z - 4Y + 4Z

Ok im confused on how to do my math homework and if "-" means subtract or oppisite The problem is -Z - 4Y + 4Z - problem z flyff for fame

X = -3 y = -4 Z = 6

I know it depends on where he is, but what if the same between the numbers (it's a random problem) ZX - Y?