x - 2y + 3z = a
2x + y + z = 4
-3x + 2y - 2z = -10
Additional test cases were added along with an improved solution-checking assertion.
Tell me the slope
Return 'on' or 'off'
Area of a triangle
Create an anti-identity matrix
Sum of cubes
Return ! if array element starts with a certain letter. Otherwise return ?
Find the product of the positive elements above the main diagonal.
Return the amount of palindromes (words) in the string.
Numerate input arguments
Create cotangent function out of sine.
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