Caucule. a)3x+4x+8x b)3x(ao cubo)4x(ao cubo) c)12xy-8xy+20xy


c)4x(ao cubo)-8x7 20-30x(ao cubo)


d) (dois sobre tres)ab+ (quatro sobre cinco)ab


e)(seis sobre cinco)xy-(um sobre dois)xy



f)60x-120x


g)3x(ao cubo)4x(ao cubo)


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