\[\boxed{\mathbf{2}\mathbf{.}\mathbf{104}}\]
\[1)\ 256 + 44 \cdot (135 - 86) =\]
\[= 256 + 44 \cdot 49 = 2412\]
\[2)\ 344 + 56 \cdot (153 - 95) =\]
\[= 344 + 56 \cdot 58 = 3592\]
\[3)\ (1239 + 601) \cdot (1521 - 1481) =\]
\[= 1840 \cdot 40 = 73\ 600\]
\[4)\ (1203 - 1143) \cdot (1176 + 394) =\]
\[= 60 \cdot 1570 = 94\ 200\]