Creating a view: ERROR: rules on SELECT must have action INSTEAD SELECT

I get the following error when trying to create a view with the
following trivial example.

SQL error:
ERROR: rules on SELECT must have action INSTEAD SELECT

In statement:
CREATE VIEW "nutrition"."test_view" AS SELECT 2 as two, 3 as three
INTO TEMP temp_table; SELECT *,two+three as five FROM temp_table;

If I rewrite the statement to maybe make more sense:

SQL error:

ERROR: temporary tables cannot specify a schema name

In statement:

SELECT 2 as two, 3 as three INTO TEMP nutrition.temp_table; CREATE
VIEW "nutrition.test_view" AS SELECT *,two+three as five FROM
nutrition.temp_table;

So the question is how do I use the powerful feature of temporary
tables with views? And if this is not possible, how do I do something
similar for optimization reasons (ie pretend "two+three as five" is
some very expensive operation and "two" and "three" were also
expensive operations)?