Question

-2√7+5√7-8√7+3√7-5√7+√7
1/3√2-2√2+7√2-1/6√2
5√11-3√17-4√11-9√11+8√17

Answer 1

1) -2√7+5√7-8√7+3√7-5√7+√7 = -6√7
2) 1/3√2-2√2+7√2-1/6√2 = 31√2/6
3) 5√11-3√17-4√11-9√11+8√17=8√11 +5√17