Пожалуйста алгебра 7 класс

Решите задачу:

$1. \\ a) { ({7}^{2}) }^{5} = {7}^{10} \\ b) { ({3}^{4} )}^{3} = {3}^{12} \\ c) { ({11}^{10} )}^{12} = {11}^{120} \\ d) { ({0.3}^{15} )}^{4} = {0.3}^{60} \\ e) { { ((({3})^{4} )}^{3}) }^{2} = {3}^{24} \\ 5. \\ a) {2}^{3} \times {3}^{3} = {6}^{3} \\ b) {7}^{14} \times {25}^{7} = {7}^{14} \times {5}^{14} = {35}^{14} \\ c) {8}^{12} \times {4}^{18} = {2}^{36} \times {2}^{36} = {4}^{36} \\ 7. \\ a) \frac{ {2}^{8} \times {2}^{21} }{ {2}^{28} } - 2 = \frac{ {2}^{29} }{ {2}^{28} } - 2 = 2 - 2 = 0 \\ b) \frac{ {21}^{3} }{ {3}^{4} \times 49 } = \frac{ {7}^{3} \times {3}^{3} }{ {3}^{4} \times {7}^{2} } = \frac{7}{3}$