$\frac{1}{4x}+\frac{3}{x+5}+\frac{4}{2x}$
$\sinh\left(x\right)=\cosh\left(x\right)$
$0,6\:-0,45$
$3^{x^2+x}=\sqrt{3}$
$\lim_{x\to\:\infty}\left(\frac{x+5}{x}\right)^{2x-1}$
$\lim_{x\to+\infty}\left(\sqrt{x^{2}-2x+1}-\sqrt{x^{2}-2x+4}\right)$
$xy'+2y=-x^2e^x$
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