What will come in place of the question mark (?) in the following equation?
$4003 \times 77 - 21015 = ? \times 116$

If $x + (1/x) = 2$,then what is the value of $x^{21} + (1/x^{1331})$?

What will come in place of the question mark (?) in the following expression?
$5 \frac{17}{37} \times 4 \frac{51}{52} \times 11 \frac{1}{7} + 2 \frac{3}{4} = ?$

$(8 \div 88) \times 8888088 = ?$

$337.62 + 8.591 + 34.4 = ?$

What is the simplified value of $(3+1)(3^{2}+1)(3^{4}+1)(3^{8}+1)(3^{16}+1)?$