There is something wrong. The solution I submit is not the solution I edited instead of original file.
I was intrigued by this identity, but the straightforward approach scores better in Cody.
Angle between Two Vectors
Max index of 3D array
Sum of odd numbers in a matrix
Sum of series IV
Crop an Image
Find the nth nude number
Find pairs of primes with the same digit sum and a specified separation
List the good primes
Determine whether a number is a fibodiv number
Solve an ODE: second-order linear equation with constant coefficients
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