Question

{-23 + [-13² + (+18 + 20 ) -15 ] + 103 }​

Answer 1

{-23 + [-13² + (+18 + 20 ) -15 ] + 103 }​

{-23+[169+(38)-15]+103}

{-23+[169+38-15]+103}

{-23+192+103}

=272

Answer 2

conforme faremos a conta eliminamos os parênteses, os cochetes e às chaves.

{-23 + [-13² + (+38 ) -15 ] + 103 }

{-23+ [ 169+38-15] +103}

{-23+ [169+23] +103}

-23 + 192+103

-23+ 295=

272