CREATE TABLE table_203_763 (id NUMBER, "year" NUMBER, "competition" CLOB, "venue" CLOB, "position" CLOB, "notes" CLOB)

what is the difference in the meters for the 1985 competition and the 1987 competition ?
SELECT (SELECT "notes" FROM table_203_763 WHERE "year" = 1985) - (SELECT "notes" FROM table_203_763 WHERE "year" = 1987)
SELECT (SELECT "notes" FROM "table_203_763" WHERE "year" = 1985) - (SELECT "notes" FROM "table_203_763" WHERE "year" = 1987)