\[\boxed{\ \mathbf{435\ (435)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ при\ x = 8:\]
\[34x + 66x = x(34 + 66) =\]
\[= x \cdot 100 = 8 \cdot 100 = 800.\]
\[2)\ при\ \ a = 26:\]
\[54a - 39a = a(54 - 39) =\]
\[= 15a = 15 \cdot 26 = 390.\]
\[3)\ при\ m = 394:\]
\[18m - 5m + 7 =\]
\[= m(18 - 5 + 7) = 20m =\]
\[= 20 \cdot 394 = 7880.\]
\[4)\ при\ z = 82:\]
\[19z - 12z + 33z - 192 =\]
\[= z(19 - 12 + 33) - 192 =\]
\[= 40z - 192 = 40 \cdot 82 - 192 =\]
\[= 3280 - 192 = 3088.\]
\[\boxed{\mathbf{435}.\ }\]
\[40 \cdot (44 - 28) = 40 \cdot 16 =\]
\[= 640\ (кг) - углекислого\ газа\ \]
\[больше\ \]
\[поглощают\ 40\ тополей,\ чем\ \]
\[40\ дубов.\]
\[Ответ:на\ 640\ кг.\]