\[\boxed{\mathbf{277}\mathbf{\ (243)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 374 - x;\ \ \ x = 268:\]
\[374 - 268 = 106.\]
\[2)\ a + b + 988;\ \ \ a = 714;\ \ \]
\[b = 569:\]
\[714 + 569 + 988 = 2271\]
\[3)\ a - 314 + 625 - c;\ \ \ \]
\[a = 836;\ \ b = 442:\]
\[836 - 314 + 625 - 442 = 705\]