3n-7 The sequence goes up in 3s. This is where you get the 3n from. However, the difference between this sequence and the 3 times tables is -7. For example, -4,-1,3,5,8 3,6,9,12,15 The difference is -7, which is where that number comes from.

Do you have an example of the poetry you would like to compare? Overall, when you are comparing unseen poetry you need to read through the poem TWICE before you start to answer. After this you should understand what the two poems are about. You will need to compare the language and dramatic/poetic methods that are used. Hope this helps :)