\[\boxed{\ \mathbf{195.}}\]
\[1)\ 3000 - (1085 - 833)\ :42 =\]
\[= 2994\]
\[1085 - 833 = 252\]
\[252\ :42 = 6\]
\[3000 - 6 = 2994\]
\[3)\ (1248 + 652) \cdot (1423 - 1373) =\]
\[= 1900 \cdot 50 = 95\ 000\]