This one should work for all of the test cases except that you have some numerical precision issues with the last test case. Please replace it with a numerical comparison that takes into account precision (my code is returning numbers with no decimal point but the test code returns something less pretty).
given 3 sides, find area of this triangle
Make a Star Pyramid
I've got the power! (Inspired by Project Euler problem 29)
sum of non-primes
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