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OpenStudy (anonymous):
simplify the expression Please? z^2(z^4-z^2)+4z^3(z+1)
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OpenStudy (saifoo.khan):
\[\Huge z^6+3 z^4+4 z^3 \]
OpenStudy (anonymous):
z^6 -z^4 +4z^4 +4z^3 z^6 +4z^4 +4z^3
OpenStudy (anonymous):
z^6+3z^4+4z^3
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