(5⁴+5·3⁶)/(5³+5²·3²)=5(5³+3⁶)/(5²(5+3²))=(5+3²)(5²-5·3²+3⁴)/(5(5+3²))=
=(5²-5·3²+3⁴)/5=(25-45+81)/5=61/5=12,2
(6⁶2³-3⁶)/(6⁶+3³6³+3⁶)
6⁶=(3⁶2⁶) 6³=3³2³
(6⁶2³-3⁶)/(6⁶+3³6³+3⁶)= ((3⁶2⁶)2³-3⁶)/((3⁶2⁶)+3³(3³2³)+3⁶)=
=(3⁶(2⁹-1))/(3⁶(2⁶+2³+1))=(2⁹-1)/(2⁶+2³+1)=[(2³-1)(2⁶+2³+1)]/(2⁶+2³+1)=
=(2³-1)=7
(-27)∧(-15)·(-9)∧20/[(-3)∧(-7)]={([(-3)∧(3)]∧(-15))·((-3)²)∧20}/[(-3)∧(=7)]=
=(-3)∧(-45+40-(-7))= (-3)∧2=9