In this problem you indicated to have (3/6) to the second power like you said + 7x4 - 5
so first we multiply 3/6 x 3/6 we get 9/36 simplifying that we get 1/4
so now we have 1/4 times 2 which is 2/4 and simplifing that is 1/2 and 7 x 4 = 28
so 28 + 1/2 = 28 1/2 or in decimal forum ( see the pun there XD) is 28.5
so 28 1/2 - 5 = 23 1/2 but if you need decimal form it's 23.5