The problem description and test suite have been improved.
Try 1.5.4: Celsius to Fahrenheit
Check that number is whole number
Make roundn function
Sum positive elements of matrix.
For given xx,x, y vectors build spline of x and y and find yy values for xx vector.
Find the sides of an isosceles triangle when given its area and height from its base to apex
Find hen's weight.
Solve expression I
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