c)3^18*8^18 :(6^16*4^16)=
=3^18*2^54 :(2^16*3^16*2^32)=
=3^18*2^54 :(2^48*3^16)=
=3^2 *2^6=9*64=576
d)15^38 :5^38-(3^19)^2=
=3^38 * 5^38 :5^38-3^38=
=3^38 -3^38=0
e)14^27 : 7^27 :2^5^2 =
=2^27 *7^27 : 7^27 :2^25 =
=2^2=4
f)10^64 :2^64 -6^4^3 =
=2^64 *5^64 :2^64 -2^64 *3^64 =
=5^64-2^64 *3^64 (aici probabil e o eroare -in loc de 5^64 cred ca trebuia sa fie 5^64 si rezultatul ar fi fost 0)