Y=3^x-1/27

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Y = 3^x - 1/27

To simplify the expression, we first note that 1/27 can be written as 3^(-3). So, the expression can be rewritten as:

Y = 3^x - 3^(-3)

Using the rule for subtracting exponents with the same base, we can combine the terms to get:

Y = 3^x - 3^3

As 3^3 equals 27, the expression simplifies to:

Y = 3^x - 27