Simplify: the sum of 5.5 and 4.3 all divided by the quantity 4 end quantity times the quantity 2 minus 6 end quantity squared plus 5.

44.2
−4.8
−14.6
−34.2

To simplify this expression, we need to follow the order of operations (PEMDAS).

First, let's simplify the expression within the parentheses: 2 - 6 = -4.
Next, let's square -4: (-4)^2 = 16.
Now, let's add 5 to the squared value: 16 + 5 = 21.
Then, let's divide the sum of 5.5 and 4.3 by 4: (5.5 + 4.3) / 4 = 9.8 / 4 = 2.45.
Finally, let's multiply 2.45 by 21: 2.45 * 21 = 51.45.

Therefore, the simplified expression is 51.45.