21+4(32-5)=448
I think it’s 448
Answer: f (
1
−
x
)
=
3
x
2
−
6
x
+
4
Your WElcome
Remark
If you just want the way this would be written out the answer is

Note
1. The quotient is the answer of a division problem.
2. The number is represented by the letter x