Respuesta :
PEMDAS
Parentheses first (then multiplication first in parentheses)
-1-3[16+18] finish parentheses
-1-3[34] multiplication first
-1-102 now addition/subtraction
-103
Parentheses first (then multiplication first in parentheses)
-1-3[16+18] finish parentheses
-1-3[34] multiplication first
-1-102 now addition/subtraction
-103