(sqrt(72)-sqrt(18))-:sqrt(12)" is equal to "

(sqrt72 - sqrt18) / sqrt12 is equal to :

The value of (sqrt32+sqrt48)/(sqrt8+sqrt12) is equal to

2sqrt3-sqrt3-3sqrt3+sqrt(12) is equal to

The value of 1/(sqrt(10) - sqrt(9)) - 1/(sqrt(11) - sqrt(10)) + 1/(sqrt(12) - sqrt(11)) - .... - 1/(sqrt(121) - sqrt(120)) is equal to