In the context of chemistry, "4s" refers to the 4th energy level (shell) and the s orbital within that energy level. The "y" is not a standard scientific notation or symbol, so it is unclear what it represents in this context. If you provide more information or context, I can offer a more specific explanation.
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EX: y=|2x+4| EX: z= -|4s^2|
2s - 12 + 2s = 4s - 124s - 12 = 4s - 124s = 4ss = s==========this is an identity and any number can be s
The answer is 4! - [(4+4)/4]
7 and 2/4s
(y * x) - y = y * (x - 1)