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Mathematics 20 Online
OpenStudy (anonymous):

(x5 y-7)(x-8 y9)-1

OpenStudy (amistre64):

i think your missing some notations

OpenStudy (turingtest):

@fasttrack welcome to open study! we are happy to help you, but that is simply impossible when the question is not typed clearly, as is the case here please carefully type out each problem yourself (do not copy-paste) to make sure each question is legible and free of typos thanks

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