(8,2*0,45+14,71)*3,8-49,436

To solve this expression, we follow the order of operations, which is PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).

First, let's compute the expression in parentheses: 2 * 0.45 + 14.71 = 0.9 + 14.71 = 15.61

Now, we substitute the result back into the original expression: (8, 15.61) * 3.8 - 49.436

Next, we perform the multiplication: 8 * 15.61 = 124.88

Now the expression becomes: 124.88 * 3.8 - 49.436

Now, we perform the final multiplication and subtraction: 124.88 * 3.8 = 474.944 474.944 - 49.436 = 425.508

Therefore, the final result of the expression is 425.508.