Hey there...
Let's solve this problem by steps.
Method 1 -
Step 1 --> Taking GCF
\(y^2 ( 7 - 1 )\)
Step 2 ---> Combining like terms
\(y^2 ( 6)\)
Or
\(6y^2\) is your final answer.
Method 2 -
We can straight way subtract \(y^2\) from \(7y^2\) which is
\(7y^2 - y^2\)
\(=\ \textgreater \ 6y^2\)
Hope it helped you.. :)