To simplify the expression \((49x - 14y) + (37x + 70y)\), we can first combine like terms.
-
Combine the \(x\) terms: \[ 49x + 37x = 86x \]
-
Combine the \(y\) terms: \[ -14y + 70y = 56y \]
Now, putting it all together, we have: \[ 86x + 56y \]
Therefore, the simplified expression is:
D. \(86x + 56y\).