12^2+12
12*12+12
144+12
156
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122 + 52 = 169 This is equal to 132.
a2 + a2 = 2a2
If x is equal to 5, then x squared plus 25 is equal to 50.
when 144 is squared it is the same as 12
Assuming the thing is as written and there are no brackets missed out then it is just 4 squared times 3 = 16x3=48.