4-√11=-(?-?)1×(2√6+1)=1+?√7+2√3=2√3+?-?+2√5=04√10×1/?=1

Question

4-√11=-(?-?)
1×(2√6+1)=1+?
√7+2√3=2√3+?
-?+2√5=0
4√10×1/?=1

Answer 1

4-√11 = -(√11-4) 
1*(2√6+1) = 1+2√6 
√7+2√3 = 2√3+√7 
-2√5+2√5 = 0 
4√10 * 1/(4√10) = 1