6 * 14 - (9 + 8)2 = 50
First, do the parentheses:
9 + 8 = 17
Your new equation would then be 6 * 14 - 17 * 2
Then multiply starting from left to right:
6 * 14 = 84
17 * 2 = 34
Your new equation would then be 84 - 34
Now subtract:
84 - 34 = 50
There you go! If you have any more questions feel free to comment! :D