To simplify the expression you provided, we need to carefully interpret the notation. From your description, it seems like we have the expression:
\[ (2XY^3)^4 \]
This expression is raised to the power of 4, and we can apply the properties of exponents to simplify it.
Using the property \((ab)^n = a^n b^n\) and \((x^m)^n = x^{m \cdot n}\), we can break down the expression as follows:
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Raise the coefficient and each variable inside the parentheses to the power of 4:
\[ (2XY^3)^4 = 2^4 \cdot X^4 \cdot (Y^3)^4 \]
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Calculate \(2^4\):
\[ 2^4 = 16 \]
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For \(X^4\), it remains \(X^4\).
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For \(Y^3\) raised to the power of 4, we use the property \((Y^3)^4 = Y^{3 \cdot 4} = Y^{12}\).
Putting it all together, we have:
\[ (2XY^3)^4 = 16X^4Y^{12} \]
If we wanted to express this with some additional notation you mentioned, but based on the final result, the expression simplifies to:
\[ 16X^4Y^{12} \]
As for the suggested options you mentioned like \(16X^{25}\), \(32X^{10}Y^{11}\), or \(16X^{10}\) with the numerator seemingly being some form, they don't align with the simplified expression we've derived from the exponentiation.
Thus, the correct answer is:
\[ \boxed{16X^4Y^{12}} \]