(-2x)²+(6x³-12x⁴)÷﹙3x²﹚

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(-2x)²+(6x³-12x⁴)÷﹙3x²﹚

(-2x)²+(6x³-12x⁴)÷﹙3x²﹚
=4x²+2x-4x²
=2x

(-2x)²+2x-4x²=2x