Simplify: \[15a-\left[ 8{{a}^{3}}+3{{a}^{2}}-\left\{ 8{{a}^{2}} \right. \right.\left. \left. \left( 4-2a-{{a}^{2}} \right)-5{{a}^{3}} \right\} \right]\]

\[-12{{a}^{3}}+5{{a}^{2}}+19a-4\]

Simplify: \[15a-\left[ 8{{a}^{3}}+3{{a}^{2}}-\left\{ 8{{a}^{2}} \right

1.	Simplify: \[15a-\left[ 8{{a}^{3}}+3{{a}^{2}}-\left\{ 8{{a}^{2}} \right. \right.\left. \left. \left( 4-2a-{{a}^{2}} \right)-5{{a}^{3}} \right\} \right]\]
A.	\[-12{{a}^{3}}+5{{a}^{2}}+19a-4\]
B.	\[3{{a}^{2}}{{b}^{2}}+5a\]
C.	\[5{{a}^{2}}+6{{a}^{2}}+2a+3\]
D.	\[3{{x}^{2}}z-3yz+3xy+7z\]
Answer» B. \[3{{a}^{2}}{{b}^{2}}+5a\]

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Simplify: \[15a-\left[ 8{{a}^{3}}+3{{a}^{2}}-\left\{ 8{{a}^{2}} \right. \right.\left. \left. \left( 4-2a-{{a}^{2}} \right)-5{{a}^{3}} \right\} \right]\]

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