Simplify: 3 times the square root of 5 - 2 times the square root of 7 + the square root of 45 - the square root of 28 2 times the square root of 12 2 times the square root of 2 six times the square root of 5 - four times the square root of 7 six times the square root of 10 - four times the square root of 14