To simplify this expression, we will first apply the power rule of exponents, which states that when raising a power to another power, we multiply the exponents:
(а^-2)^3 = а^-6
Next, we will simplify the expression by multiplying the remaining terms together:
To simplify this expression, we will first apply the power rule of exponents, which states that when raising a power to another power, we multiply the exponents:
(а^-2)^3 = а^-6
Next, we will simplify the expression by multiplying the remaining terms together:
(а^-6) × а^5 × 5 / а^-7 × а^4
= а^-6 × а^5 × 5 × а^4 / а^-7
= 5 × а^-6 × а^5 × а^4 / а^-7
= 5 × а^3
Therefore, the simplified expression is 5a^3.