50-19,56:(0,237+0,163)-0,71•0,5

Let's break down the expression step by step:

1. Calculate the first part: \[ 50 - 19.56 = 30.44 \]

2. Calculate the part inside the parentheses: \[ 0.237 + 0.163 = 0.4 \]

3. Do the division: \[ 56 \div 0.4 = 140 \]

4. Calculate the multiplication: \[ 0.71 \times 0.5 = 0.355 \]

5. Now, combine all parts: \[ 30.44 - 140 - 0.355 \]

6. Continue with the subtraction: \[ 30.44 - 140 = -109.56 \] \[ -109.56 - 0.355 = -109.915 \]

Putting everything together, the final result is: \[ \text{Result} = -109.915 \]