To perform the addition \(-1310 + (-4215)\), you can treat this as adding two negative numbers:
\[ -1310 + (-4215) = -1310 - 4215 \]
Now, you can combine the absolute values of the two numbers:
\[ 1310 + 4215 = 5525 \]
Since both numbers are negative, the result is negative:
\[ -1310 + (-4215) = -5525 \]
Thus, the final answer is \(-5525\).