How can i use the numbers 7, 5, 6, and 3, only once each, to create an expression that equals 75 using parentheses?

The answer is (3×7-6)×5 = 75

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.