$-4\cdot11\cdot3$
$2\ln\left(y^2+4\right)+2\ln\left(x^2+1\right)$
$\left(e^{2x}y^2-2x\right)dx+\left(e^{2x}y\right)dy=0$
$f\left(x\right)=\sqrt{x^2}+1\:-x$
$-3p+4=7$
$\lim_{x\to\infty}\left(x-\sqrt{x^2+6x}\right)$
$\frac{\left(x-5\right)}{\left(x+2\right)}\ge8$
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