Write expanded form and standard form decimals with tents

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Can someone me with the property questions for 12 13 and 14 plz

Me! i will mark you brainliest if you are right and show your i don't get polynomials and all the other stuff. multiply and simplify.2x(^2)y(^3)z(^2) · 4xy(^4)x(^2)show your