\(\lim\limits_{x\rightarrow1}\dfrac{3-2x^2-x^4}{5-3x-2x^2}\)

\(lim\left(2n+1-\sqrt{4n^2-3}\right)\)

\(lim\dfrac{\left(-3\right)^n+4.2^n}{2-\left(-3\right)^n}\)

\(lim\dfrac{\sqrt{3n^2-3}-\sqrt{n^2-2n-1}}{2n}\)

\(lim\dfrac{4n^5+n^3-5n+3}{\left(2n^2-3\right)\left(2n+1\right)^3}\)

\(lim\dfrac{4n^5+n^3-5n+3}{\left(2n^2-3\right)\left(2n+1\right)^3}\)