Answer: 3, 2y, 1, 5x.
We have to simplify the given expressions.
We use the formula: [tex]ln(e^a)=a[/tex].
So, [tex]ln(e^3)=3[/tex], here a = 3.
[tex]lne^{2y}=2y[/tex], here a = 2y.
We will use that: ln(1) = 0 and [tex]e^{ln(b)}=b[/tex]
[tex]e^{ln(1)}=e^0=1[/tex]
[tex]e^{ln(5x)}=5x[/tex], here b = 5x.
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