Indicate with true (T) or false (F) whether the following expressions are polynomials.?

[T K]

1) x+2.
2) sqrt of 2. (?2)
3) sqrt of x (?x).
4) |x|.
5) [1/x].
6) (x+1)200000.
7) ?{1+x2}

Please help me, in order to get correct answer i have to submit them all at the same time to know if i got them all correct.