СРОЧНО ПОМОГИТЕ ПОЖАЛУЙСТА 1) 4^-6/4^-3 2) (x^-2)^-6 * x^-73) 1.2a^-b b^8*5a^6b^-94)...

$({x}^{ - 2} )^{ - 6} \times {x}^{ - 7} = {x}^{ - 2 \times ( - 6) + ( - 7)} = {x}^{12 - 7} = {x}^{5}$

$1.2 {a}^{ - 6} {b}^{8} \times 5 {a}^{6} {b}^{ - 9} = 6 {a}^{ - 6 + 6} {b}^{8 + ( - 9)} = 6 {a}^{0} {b}^{ - 1} = \frac{6}{b}$

$({5}^{ - 1} )^{3} = {5}^{ - 1 \times 3} = {5}^{ - 3} = \frac{1}{ {5}^{3} } = \frac{1}{125}$

$\frac{ {4}^{ - 6} }{ {4}^{ - 3} } = {4}^{ - 6 - ( - 3)} = {4}^{ - 6 + 3} = {4}^{ - 3} = \frac{1}{ {4}^{3} } = \frac{1}{64}$

Готово.