Выполни сложение и вычитание.
$\snippet{name: op_column, sign: '-', x: '31', y: '17', z: ' '}$
$\snippet{name: op_column, sign: '+', x: '48', y: '52', z: ' '}$
$\snippet{name: op_column, sign: '-', x: '60', y: '15', z: ' '}$
$\snippet{name: op_column, sign: '+', x: '71', y: '19', z: ' '}$
$\snippet{name: op_column, sign: '-', x: '79', y: '8', z: ' '}$
$\snippet{name: op_column, sign: '+', x: '45', y: '45', z: ' '}$
$\snippet{name: op_column, sign: '-', x: '31', y: '17', z: '14 '}$
$\snippet{name: op_column, sign: '+', x: '48', y: '52', z: '100 '}$
$\snippet{name: op_column, sign: '-', x: '60', y: '15', z: '45 '}$
$\snippet{name: op_column, sign: '+', x: '71', y: '19', z: '90 '}$
$\snippet{name: op_column, sign: '-', x: '79', y: '8', z: '71 '}$
$\snippet{name: op_column, sign: '+', x: '45', y: '45', z: '90 '}$
