Короче вот!Ну плиз.

Здравствуйте!

$1) \: 10 {}^{2} - 7 {}^{2} = 100 - 49 = 51 \\ 2) \: 5 {}^{3} - 5 {}^{2} = 125 - 25 = 100 \\ 3) \: 42 {}^{2} \div 14 - 4 {}^{2} \times 6 = \\ = 1764 \div 14 - 16 \times 6 = \\ = 126 - 96 = 30$
$4) \: 8 {}^{3} \div 4 {}^{2} - 2 {}^{3} = \\ = 512 \div 16 - 8 = \\ = 32 - 8 = 24 \\ 5) \: 25 {}^{2} \div (24 {}^{2} + 7 {}^{2} ) = \\ = 625 \div (576 + 49) = \\ = 625 \div 625 = 1$
$6) \: 10 {}^{3} - 10 {}^{2} + 9 {}^{3} = \\ = 1000 - 100 + 729 = \\ = 1629$

Удачи в учёбе!!