(2+1){[(-4+4)2+3](-1)-7}

Apply PEMDAS rule to follow the order of operations

P=parantheses, E=exponents, M=multiplication, D=division, A=addition , and then S= subtraction.

So, we solve parentheses first

= 3{[(0)2+3](-1)-7}

= 3{[3](-1)-7}

= 3{-3-7}

= 3{-10}

= -30

It is the solution of this expression.