Line up numbers vertically: First, we line up the numbers vertically with the larger number on top:\begin{align*}&\phantom{+}9714(\newline\)&+2072(\newline\)\end{align*}Now we add the numbers starting from the rightmost digit.
Add ones place: Adding the ones place: 4+2 equals 6.
Add tens place: Adding the tens place: 1+7 equals 8.
Add hundreds place: Adding the hundreds place: 7+0 equals 7, but oops, I made a mistake here, it should be 7+0 equals 7, so no error actually.
Add thousands place: Adding the thousands place: 9+2 equals 11, so we write down 1 and carry over the 1 to the next place.
Carry over: Since there are no more digits to add to the left, we just bring down the 1 that we carried over.
Bring down: The final answer is 11786.
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