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Sum of Squares of Binomial Coefficients
## Formula
$$\sum_{r=0}^{n}\left({}^nC_r\right)^2={}^{2n}C_n$$
## Usage
- Used to evaluate sums involving squares of binomial coefficients.
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Sum of Squares of Binomial Coefficients
## Formula
$$\sum_{r=0}^{n}\left({}^nC_r\right)^2={}^{2n}C_n$$
## Usage
- Used to evaluate sums involving squares of binomial coefficients.
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