Assuming the thing is as written and there are no brackets missed out then it is just 4 squared times 3 = 16x3=48.
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a2 + a2 = 2a2
If x is equal to 5, then x squared plus 25 is equal to 50.
285
122 + 52 = 169 This is equal to 132.
9 plus 16=25 3 squared is the same as 3 times three and 4 squared is the same as 4 times 4 3 times 3 + 4 times 4 9 plus 16 = 25