JS question “i dont know why i am getting a different answer”

let a = 10;

let b = “20”;

let c = 80;

console.log(–c + +b + –a * +b++ – +b * a + –a – +true);

**I think I should get 108 then multiple it by -1 then multiple it by 16 which should result in -1728 however I am getting an answer of 97!!!!

how is that possible?

when I broke the problem into 3 pieces (–c + +b + –a)(+b++ – +b)(a + –a – +true) the computer agreed with me that the first part should be 108 then -1.

I need help guys. someone explain it to me, please.

THANKS**