52*3+(280+x)

To simplify the expression \( 52 \times 3 + (280 + x) \), you can follow these steps:

1. Calculate \( 52 \times 3 \): \[ 52 \times 3 = 156 \]

2. Now, substitute it back into the expression: \[ 156 + (280 + x) \]

3. Distribute the addition: \[ 156 + 280 + x \]

4. Combine the constants: \[ 436 + x \]

So, the simplified expression is: \[ 436 + x \]