\[\boxed{\mathbf{32.}}\]
\[\textbf{а)}\ 36 + 1 = 37\]
\[36 - 1 = 35\]
\[53 - 1 = 52\]
\[53 + 1 = 54\]
\[\textbf{б)}\ 68 + 1 + 1 = 69 + 1 = 70\]
\[89 + 1 + 1 = 90 + 1 = 91\]
\[40 - 1 - 1 = 39 - 1 = 38\]
\[71 - 1 - 1 = 70 - 1 = 69\]