\[\boxed{\ \mathbf{177\ (177)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ (74 + x) + 38 =\]
\[= (74 + 38) + x = 112 + x\]
\[2)\ 238 + (a + 416) =\]
\[= (238 + 416) + a = 654 + a\]
\[3)\ y + 324 + 546 = y + 870\]
\[4)\ 2753 + m + 4199 =\]
\[= m + (2753 + 4199) =\]
\[= m + 6952\]
\[5)\ (b + 457) + (143 + 872) =\]
\[= b + 872 + (457 + 143) =\]
\[= b + 872 + 600 = b + 1472\]
\[6)\ (2235 + c) + (4671 + 1765) =\]
\[= c + 4671 + (2235 + 1765) =\]
\[= c + 4671 + 4000 = c + 8671\]
\[7)\ (1696 + 3593) + (p + 1304) =\]
\[= p + 3593 + (1304 + 1696) =\]
\[= p + 3593 + 3000 = p + 6593\]
\[= a + 10\ 000 + 10\ 000 =\]
\[= 20\ 000 + a\]
\[\boxed{\ \mathbf{177}\mathbf{\ (144)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]