Boil 7 cups water and 2 cups sugar. Cool. Boil 4 cups water. Add 4 teabags; brew until black. Combine water-sugar mixture, tea, 1 (12 ounce) can frozen lemonade, and 1 (12 ounce) can frozen orange juice. Mix well and add 3 1/2 cups brandy. Freeze. To serve: Fill glass 1/2 to 2/3 full with slush, fill rest of glass with 7 UP.