REPEDEEEEEEEEEEEEEEEEEEEEE!!
VA ROG.

-27+27+3^9:(-3^6)-3^10:(8*3^5+3^5)+2*27 <=>
<=> 3^9:(-3^6)-3^10:[3^5*9]+56 <=>
<=> -3^3-3^10:3^7+56=-27-27+56=0
R:S={0}