63 20 7=50

One way to make 50 is:

• 63 - 20 + 7 = 50 Explanation: 63 - 20 = 43; 43 + 7 = 50.

Another valid form is:

• 63 - (20 - 7) = 50 Explanation: 20 - 7 = 13; 63 - 13 = 50.

Want me to find all possible operator placements that yield 50?