Question

{42+[(45-19)-(18-3)+1]-(28-15)-1}

Answer 1

{42+[(45-19)-(18-3)+1]-(28-15)-1}
{42+[26-(15)+1]-(13)-1}
{42+[12]-14}
{42+12-14}
40 < resposta

Answer 2

{42+[(45-19)-(18-3)+1]-(28-15)-1} =
{42+[26-15+1] - 13 -1} 
{42+12-14} = 40