Simplify the expression
\frac{1}{\sqrt{36}} - \sqrt{27} - \frac{1}{\sqrt{27}} + \frac{1}{\sqrt{18}}.
\(\frac{1}{\sqrt{36}} - \sqrt{27} - \frac{1}{\sqrt{27}} + \frac{1}{\sqrt{18}} \)
1/6 - 1/sqrt (27) - sqrt (27) + 1/ sqrt (18) =
1/6 - [ 1/sqrt (27) + sqrt (27) ] + 1/ (3 sqrt (2))
1/(3*2) + 1/(3sqrt 2) - [ 1/(3sqrt 3) + 3sqrt (3) ] =
[ 1 + sqrt 2 ] / 6 - sqrt (3) / 9 - 27sqrt 3 / 9 =
[ 1 + sqrt 2[ / 6 - [ 28 sqrt (3) ] / 9 =
[ 3 + 3sqrt 2 - 56 sqrt 3 ] /18