√75 + √8 -(√32 + √48) =

5√3 + 2√2 – 4√2 + 4√3
= (5√3 + 4√3) + (2√2 – 4√2)
= 9√3 – 2√2

8,660+2,828-(5,656+6,928)
11,488-12,584
-1,096