Question

5+2)-3(4-7)+[3+(-4)]=

Answer 1

$(5+2)-3(4-7)+[3+(-4)]$

=> Primero resuelve los parentesis.
=>(5+2)= 7
=>(4-7)= -3
=>-3(-3)= 9
=> 3+(-4)= -1

=> 7-3(-3)-1
=>7+9-1
=>15

Saludos :)