( 12−√3 + 22+√3 )−1
= 2+√3+2(2−√3)(2−√3)(2+√3)
= 2 + √3 + 4 - 2√3
= (6 - √3)−1
= 16−√3
= 6+√36−√3*6+√3
= 6+√333