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wegnerkolmp2741o

(-2x^2)^3*3x is -24x^7

exponents first

(-2x^2)^3

(-2)^3 x^(2)^3  (when raised to a power multiply the powers on the exponent)

(-2) *(-2) *(-2)*x^(2*3)

-8 x^6

-8 x^6 * 3x

-8*3 * x^6 *x  (when multiplying  add the exponents)

-24 x^(6+1)

-24 x^7

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good job