\[\boxed{\mathbf{3.}\mathbf{92}}\]
\[\textbf{а)}\ 5945\ :29 + 95 = 205 + 95 =\]
\[= 300\]
\[\textbf{б)}\ (5791 - 759)\ :136 =\]
\[= 5032\ :136 = 37\]
\[\textbf{в)}\ 86\ 944\ :209\ :32 + 77 =\]
\[= 13 + 77 = 90\]
\[\textbf{г)}\ 1176\ :49 \cdot 25 - 105 =\]
\[= 600 - 105 = 495\]