Can a heli pilot "boot up" the helicopter, lift to a hover, land and repeat it twice more to comply with the 90 Day Rule?
No.
It's a perennial question. I don't have the book to hand, but it does more or less define precisely what is required, and I seem to remember mention of words like "transition" and "500 feet", though I may be wrong on that.
Basically, do the circuits - proper ones.