Расставь скобки в выражениях по данной программе действий:
$a \overset{1}{+} b \overset{2}{+} c$
$a \overset{2}{+} b \overset{1}{+} c$
$a \overset{1}{-} b \overset{2}{+} c$
$a \overset{2}{-} b \overset{1}{+} c$
$a \overset{1}{+} b \overset{2}{-} c$
$a \overset{2}{+} b \overset{1}{-} c$
$a \overset{1}{-} b \overset{2}{-} c$
$a \overset{2}{-} b \overset{1}{-} c$
$(a \overset{1}{+} b) \overset{2}{+} c$
$a \overset{2}{+} (b \overset{1}{+} c)$
$(a \overset{1}{-} b) \overset{2}{+} c$
$a \overset{2}{-} (b \overset{1}{+} c)$
$(a \overset{1}{+} b) \overset{2}{-} c$
$a \overset{2}{+} (b \overset{1}{-} c)$
$(a \overset{1}{-} b) \overset{2}{-} c$
$a \overset{2}{-} (b \overset{1}{-} c)$
Пожауйста, оцените решение