option 1) % has highest precedence then + associative left to right
-13%-5+3 ..( a mod b = a-(b*(a/b))) = $-13-(-5*\frac{13}{5})$ =$-13-(-5*2)$
-3+3
0
2) 3/-3/3 from 1 (-13%-5=-2)
-1/3
-0.3333...
3) -5%3/13
$\frac{1}{13}$
4) 4/(-10 % -2) /3 $-10-(-2*\frac{-10}{-2})$ =$-10-(-2*5)$
4/0/3 DIVISION BY ZERO ERROR