(-5x²)³-[(3x)²]³=

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(-5x²)³-[(3x)²]³=

(-5x²)³-[(3x)²]³=
(-5x²)³-[(3x)²]³=

(-5x²)³-[(3x)²]³=
(-5x²)³-[(3x)²]³=-125x^6-27x^6=-152x^6