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$1$.$1$.$3$ Qulz: Algebraic Expressions$\newline$Question $6$ of $10$$\newline$Which expression is the simplest form of $-\left(4 x^{3}+x^{2}\right)+2\left(x^{3}-3 x^{2}\right) ?$$\newline$A. $-6 x^{3}-2 x^{2}$$\newline$B. $-2 x^{3}-5 x^{2}$$\newline$C. $-2 x^{3}-7 x^{2}$$\newline$D. $-6 x^{3}-6 x^{2}$$\newline$SUBMIT$\newline$PREVIOUS