Your question is hard to follow as written
If this is what you meant please let me know
Let n represent a number
Then
n + 2 would represent the sum of the number and 2
Your information states 3 times the sum of a number and 2.
3(n+2).
Then if I understand what you have typed up there as 1(as in the number 1) added to twice the number.
again Let n represent a number,
2n would represent twice the number
1 added to twice the number would be
2n + 1.
If I have interpreted your information correctly you should have what you need to list everything in one statement. I hope this helps please let me know if you have any questions.
