Respuesta :

7+3^2(-5+1)/2 ... 7+3^2(-4)/2 ... 7+3^2(-2)... 7+9(-2)... 7-18 ... -11 perhaps ???

7 + 3^2 (-5 + 1) ÷ 2

7 + 3^2 (-4) / 2

7 + 9 (-4) / 2

7 + -36 / 2

7 + -18

-11