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Equivalent forms of exponential expressions

Determine whether each expression is equivalent to 810.5t2+t81^{\large 0.5t^2+t}.
 
Equivalent
Not Equivalent
100.5t2+t⋅(8.1)0.5t2+t10^{0.5t^2+t}\cdot(8.1)^{0.5t^2+t}
270.5t2+t⋅30.5t2+t27^{0.5t^2+t}\cdot3^{0.5t^2+t}
810.5t2⋅34t81^{0.5t^2}\cdot 3^{4t}