(5+ √6)(3 √2-2 √3)=15√2-10√3+3 √12-2√18 =15√2-10√3+6√3-6√2 =9√2-4√3=5.7997
-|-2/3-(-1/3)|+|(-1/5)+(-3/5)|=-|-2/3+1/3|+|-4/5|=-1/3+4/5 =7/15
9√2-4√3