Set x value to each even index of vector y.
Find all elements less than 0 or greater than 10 and replace them with NaN
Find Factrorial without using built-in function
Evaluating a polynomial
Multiply by 3
Set x value to each odd index of vector y.
Replace x value into y value in string text.
Solve expression I
Display positive elements of matrix.
Find sum of negative elements in row.
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