please fix the description
Filled with "5" not "4".
Solve the set of simultaneous linear equations
Duplicate each element of a vector.
Side of an equilateral triangle
Log of a number
Write a code that will follow the equation y = x * (x + x) * x.
Given the variable x as your input, multiply it by four, then divide it by two. Then put the result in y.
If you have matrix A, create matrix B using matrix A as an "element"
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