Find the missing number in the given series 6, 42, ?, 1260, 5040, 15120, 30240

Find the missing number in the given series 2, 6, 12, 20, 30, 42, 56, ?

Find the missing number in the given series 24, 60, 120, 210, ?

Find the missing number in the given series 6, 14, 36, 98, ?

Find the missing number in the given series 4, -8, 16, -32, 64, ?

Find the missing number in the given series 5, 16, 49, 104, ?