Question

como resolve esta questao 40+[15+(12-7)+3]-9

Answer 1

40+[15+(12-7)+3]-9
40+[15+5+3]-9
40+23-9
63-9
54

Answer 2

40 + [ 15 + 5 +3 ] -9
40 + 23 - 9 
63 - 9
54