\[\boxed{\mathbf{2}\mathbf{.}\mathbf{126}}\]
Пояснение.
Решение.
\[\textbf{а)}\ (17 + 3) + (24 - 9)\]
\[\textbf{б)}\ (c + 14) + 28\]
\[\textbf{в)}\ 107 + (z - d + 14)\]
\[\textbf{г)}\ (777 + 33) - (196 - 145)\]
\[\textbf{д)}\ (a + 12) - (y - 7)\]
\[\textbf{е)}\ 31 - (a + b - 28)\]