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Mathematics 7 Online
OpenStudy (anonymous):

4z^4-5z-7z^2

OpenStudy (campbell_st):

all you can do is simplify \[( 4 - 7)z^2 - 5z\] simplify the brackets and thats it

OpenStudy (skullpatrol):

$$\Huge 4z^4-5z-7z^2$$

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