Question

(36/4+12)+3.(45/5-6)-13

Answer 1

Primeira coisa que vc faz e resolver os parenteses
(9+12)+3.(9-6)-13
21+3.3-13
21+9-13
30-13
17

Answer 2

= (36/4 + 12) + 3. (45/5 - 6) - 13

= (9 + 12) + 3.(9 - 6) - 13

= 21 + 3.3 - 13

= 21 + 9 - 13

= 30 - 13

= 17