limx→a (x+2)5/3−(a+2)5/3x−a is equal to

limx→a (x+2)5/3−(a+2)5/3x−a=limx→a (x+2)5/3−(a+2)5/3(x+2)−(a+2)=limx→a y5/3−b5/3y−bwhere x+2=y and a+2=b =53b5/3−1=53b2/3=53(a+2)2/3