We want to evaluate each expression and order from the least to the greatest.
let's firstly evaluate the expressions;
[tex]\begin{gathered} 6+5=11 \\ 4+(-6)=4-6=-2 \\ -3-(4)=-7 \\ 7-(-2)=7+2=9 \\ -6-(-1)=-6+1=-5 \\ 0-9=-9 \end{gathered}[/tex]From the value of each expression we can now arrange it from the smallest to the greatest;
[tex]-9,-7,-5,-2,9,11[/tex]Writing the expression in order we have;
[tex]0-9,-3-(4),\text{ }-6-(-1),\text{ }4+(-6),\text{ }7-(-2),\text{ }6+5[/tex]Note; 0-9 is the least and 6+5 is the greatest.