SUMXMY2Calculates the sum of the squares of differences of values in two arrays.
array_x – The array or range of values that will be reduced by corresponding entries in array_y, squared, and added together.
array_y – The array or range of values that will be subtracted from corresponding entries in array_x, the result squared, and all such results added together.
SUMX2PY2: Calculates the sum of the sums of the squares of values in two arrays.
SUMX2MY2: Calculates the sum of the differences of the squares of values in two arrays.