Выполнить действия Помогите 7 класс

Здравствуйте!

а).

$m{}^{3}\times m{}^{22} =m{}^{3+22}=m{}^{25}$

б).

$(m{}^{4}){}^{6}=m{}^{4 \times 6}=m{}^{24}$

в).

$m{}^{18} \div m{}^{6}=m{}^{18-6}= m{}^{12}$

г).

$(3m) {}^{3}=3{}^{3}m{}^{3}=27m{}^{3}$

д).

$(-2m{}^{5}n{}^{4}){}^{3}= (-2){}^{3}m{}^{5 \times 3}n{}^{4 \times 3}=-8m{}^{15}n{}^{12}$

е).

$(y{}^{4}y{}^{2}){}^{3} \div({y}^{2}y{}^{3}){}^{2}=y{}^{4 \times 3}y{}^{2 \times 3} \div(y{}^{2 \times 2}y{}^{3 \times 2}) =y {}^{12}y{}^{6}\div(y{}^{4}y{}^{6}) =y {}^{18}\div y {}^{4+6}=y{}^{18}\div y{}^{10}=y {}^{8}$