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Mathematics 20 Online
OpenStudy (anonymous):

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OpenStudy (karatechopper):

please only post math questions here thanks! Karatechopper

OpenStudy (anonymous):

\[\sum_{?}^{?}a ^{2}(b ^{2}-c ^{^{2}})\] a. 1 b. 0 c. a^2+b^2+c^2 d.a^2+b^2-c^2

OpenStudy (anonymous):

OH LML. i c

OpenStudy (anonymous):

Eh?

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