Efectuează: a) (4⁰+4¹+4²)⁵:21⁴+21⁰; b )[6²⁰²⁴:36¹⁰¹⁰+ (5¹¹)³: 25¹⁵-2023°] - [(3⁵)⁴: 9⁸+ 1²⁰²⁶];c) 6²⁴:6²³-6×(25⁴) ⁵:5³⁹; d) [(11-0²⁰²³)×(3³-3²) + 1²⁰²⁵]× (3²-2³)-3²× 2.
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