27^7 : [(2^13 + 2^13 + 2^14)^3 : 64^7 + 1]^10 =
= (3^3)^7 : {[2^13 × (1 + 1 + 2)]^3 : (2^6)^7 + 1}^10 =
= 3^21 : [(2^13 × 4)^3 : 2^42 + 1]^10 =
= 3^21 : [(2^13 × 2^2)^3 : 2^42 + 1]^10 =
= 3^21 : [(2^15)^3 : 2^42 + 1]^10 =
= 3^21 : (2^45 : 2^42 + 1)^10 =
= 3^21 : (2^3 + 1)^10 =
= 3^21 : 9^10 =
= 3^21 : (3^2)^10 =
= 3^21 : 3^20 =
= 3