I added a test to prevent lookup solutions.
Word Counting and Indexing
Project Euler: Problem 4, Palindromic numbers
Radial Zernike polynomials
Can we make a triangle?
Crop an Image
List the delete-a-digit primes
Count the primes in Collatz sequences
Investigate the frequency of last digits of prime numbers
Evaluate the incomplete elliptic integrals
Compute the fractional derivative
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