CREATE TABLE table_80442 ("D 48 +" TEXT, "D 47 +" TEXT, "D 46 +" TEXT, "D 45 O" TEXT, "D 44 O" TEXT, "D 43 \\u221a" TEXT, "D 42 \\u221a" TEXT, "D 41 \\u221a" TEXT)

What is the value of D 46 +, when the value of D 42 is r 2?
SELECT "D 46 +" FROM table_80442 WHERE "D 42 \u221a" = 'r 2'
SELECT "D 46 +" FROM "table_80442" WHERE "D 42 \u221a" = 'r 2'