\[\boxed{\mathbf{3.}\mathbf{106}}\]
\[\textbf{а)}\ 28 + 32 = 60\ :12 = 5 \cdot 17 =\]
\[= 85 + 25 = 110\]
\[\textbf{б)}\ 90 - 34 = 56\ :14 = 4 \cdot 13 =\]
\[= 52 + 18 = 70\]
\[\textbf{в)}\ 62 - 27 = 35\ :7 = 5 \cdot 19 =\]
\[= 95 - 16 = 79\]
\[\textbf{г)}\ 95 - 37 = 58\ :29 = 2 + 90 =\]
\[= 92\ :23 = 4\]
\[\textbf{д)}\ 100 - 8 = 92\ :2 = 46 - 45 =\]
\[= 1 \cdot 47 = 47\ \]