Simplify and find the value of the following expression when a = 5 and b -3 2(a ^ 2 + ab) + 3 - ab W 3a ^ 2 + 6a * (a + b)
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The kidneys filter unwanted substances from the blood and produce urine to excrete them. There are three main steps of urine formation: glomerular filtration, reabsorption, and secretion. These processes ensure that only waste and excess water are removed from the body.
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