It is used in autopsy as a method of opening a human corpse without damaging the organs. It is often referred to as step 2 after physical examination of the freshly slain corpse. If you are lucky, you can dig someone up and try this on them :)
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(y * x) - y = y * (x - 1)
y² - y all depends on the value of y. If you want to factor the expression, then we have y(y - 1)
y times y times y (or y3)
If Y and y are the same, then it is -y + 4 or 4 - y.
1 - y^(3)= 1^(3) - (3) = This factors to (1 - y)(1^(2) + y + y^(2)) More simply written as ( 1 - y)(1 + y + y^(2))