Вычисли.
$\snippet{name: op_column, sign: '+', x: '68', y: '17', z: ' '}$
$\snippet{name: op_column, sign: '+', x: '35', y: '38', z: ' '}$
$\snippet{name: op_column, sign: '-', x: '71', y: '16', z: ' '}$
$\snippet{name: op_column, sign: '-', x: '83', y: '49', z: ' '}$
$\snippet{name: op_column, sign: '-', x: '94', y: '65', z: ' '}$
$\snippet{name: op_column, sign: '+', x: '68', y: '17', z: '85 '}$
$\snippet{name: op_column, sign: '+', x: '35', y: '38', z: '73 '}$
$\snippet{name: op_column, sign: '-', x: '71', y: '16', z: '55 '}$
$\snippet{name: op_column, sign: '-', x: '83', y: '49', z: '34 '}$
$\snippet{name: op_column, sign: '-', x: '94', y: '65', z: '29 '}$