What will come in place of the question mark (?) in the following questions?
$$(18)^2 + (14)^2 - (21)^2 =?$$
$$(18)^2$$ = 324
$$(14)^2$$ = 196
$$(21)^2$$ = 441
So, $$(18)^2 + (14)^2 - (21)^2 = 324 + 196 - 441 = 79
As no such option is available so the correct answer is E
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