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Canonicalize radical not simplifying expression

I have the expression 7/6528*(103*sqrt(sqrt(17) + 17)*(sqrt(17) - 17) + 252*sqrt(17)*sqrt(-sqrt(17) + 17))/(sqrt(sqrt(17) + 17)*(sqrt(17) - 17)), which I know is a rational number based on a theorem proved from a paper. However, SageMath does not simplify this to a rational number with full_simplify() or with canonicalize_radical().

How do I force SageMath to simplify this properly?

Canonicalize radical not simplifying expression

I have the expression 7/6528*(103*sqrt(sqrt(17) + 17)*(sqrt(17) - 17) + 252*sqrt(17)*sqrt(-sqrt(17) + 17))/(sqrt(sqrt(17) + 17)*(sqrt(17) - 17)), which I know is a rational number based on a theorem proved from a paper. In fact, it is supposed to equal 35/816. However, SageMath does not simplify this to a rational number with full_simplify() or with canonicalize_radical().

How do I force SageMath to simplify this properly?