Remove the parentheses by multiplying and then simplify by combining similar terms. $3 x \left( x ^ { 2 } - 6 x - 4 \right) + x \left( 7 x ^ { 2 } + 7 x - 4 \right)$

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The Answer of Remove the parentheses by multiplying and then simplify by combining similar terms. $3 x \left( x ^ { 2 } - 6 x - 4 \right) + x \left( 7 x ^ { 2 } + 7 x - 4 \right)$

Remove the Parentheses by Multiplying and Then Simplify by Combining 3x(x2−6x−4)+x(7x2+7x−4)3 x \left( x ^ { 2 } - 6 x - 4 \right) + x \left( 7 x ^ { 2 } + 7 x - 4 \right)3x(x2−6x−4)+x(7x2+7x−4)

Remove the Parentheses by Multiplying and Then Simplify by Combining $3 x \left( x ^ { 2 } - 6 x - 4 \right) + x \left( 7 x ^ { 2 } + 7 x - 4 \right)$