The expression "4y" represents four times the variable ( y ), while "y4" typically denotes the variable ( y ) raised to the power of 4, or ( y^4 ). In essence, "4y" is a linear expression, whereas "y4" (or ( y^4 )) is a polynomial expression. Their meanings and uses in mathematical contexts are therefore quite different.
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-3/4 if the question is 3x+4y
x=y4 /2
y4
y6 x y2 y4 x y4 y2 x y2 x y4 y2 x y2 x y2 x y2
y-4y-2-3y-2y+4y+25y+2y-4y+23y+2y+4y-25y-2