60-5 40-7 30+28. 52-30

Let's calculate each of these expressions step by step:

1. \( 60 - 5 = 55 \)
2. \( 40 - 7 = 33 \)
3. \( 30 + 28 = 58 \)
4. \( 52 - 30 = 22 \)

So, the results are:

1. 55
2. 33
3. 58
4. 22