Question

1, 5, 14, 30, 55, ___, ___

Answer 1

adding squares
+2^2,+3^2,+4^2,+5^2
so 55+6^2=91
and91+7^2=140
so 90, 140

Answer 2

what does ^ mean?

Answer 3

raised to that power\[+2^2,+3^2,+4^2,...\]
you will see that notation a lot, i.e.
3^3=27