In the test suite, the correct answer should be (1+sin(x))./cos(x)+cos(x) ./ (1+sin(x)) % note the dot-slash in the second term
Well, at least if we assume that it was meant to be consistent with the problem statement :)
Note that this problem uses the word solve when it needs to say EVALUATE.
I support John D'Errico's comment: equations can be solved, but expressions cannot.
Also, it is pointless having the solution method exposed in the Test Suite. See further discussion at Problem 44617 &c.
Rotate a Matrix by 90 degrees
Sum the numbers on the main diagonal
Min of a Matrix
Summation of array
Find product of eigenvalues of n*n magic matrix.
Find hen's weight.
Convert array of decimal numbers into binary numbers array.
Replace x value into y value in string text.
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