What is the pattern between the numbers in the horizontal line and the numbers in the curved part?

The problems follow a pattern where the number in the middle of the horizontal line is the difference between the number on the left end of the horizontal line and the number on the right end of the horizontal line.
Let $L$ be the number on the left end of the horizontal line, $R$ be the number on the right end of the horizontal line, and $M$ be the number in the middle of the horizontal line.
The pattern for the horizontal line is: $L - R = M$.

Let's also find the pattern for $L$ and $R$ using the numbers on the curved part.
Let $BL$ be the bottom-left number on the curve, $TL$ be the top-