\[\boxed{\mathbf{7}\mathbf{.}}\]
\[\textbf{б)}\ 8 + 92 - 25 = 100 - 25 = 75\]
\[61 - 5 + 44 = 56 + 44 = 100\]
\[26 + (80 - 36) = 26 + 44 = 70\]
\[37 - (18 + 19) = 37 - 37 = 0\]