Ajutor, punctul C.
D-au coroana si multe puncte

c)
18 x [ 1 + 3⁷x 3⁵³ + 7⁸⁴ : 7¹⁴+ ( 5⁴ )²⁰ ] : ( 13⁰ + 3⁶⁰ + 7⁷⁰ + 5⁸⁰ ) = 18
= 18 x ( 1 + 3 ⁽ ⁷ ⁺ ⁵³ ⁾ + 7 ⁽ ⁸⁴ ⁻ ¹⁴ ⁾ + 5 ⁴ ˣ ²⁰ ) : ( 13⁰ + 3⁶⁰ + 7⁷⁰ + 5⁸⁰ ) =
= 18 x ( 1 + 3⁶⁰ + 7⁷⁰ + 5⁸⁰ ) : ( 13⁰ + 3⁶⁰ + 7⁷⁰ + 5⁸⁰ ) =
= 18 x 1 =
= 18