$\frac{1}{2+\sqrt{2}}+\frac{1}{2-\sqrt{2}}$
$\left(-6\right)^2+-6$
$65\cdot4$
$-5x^3-x^3$
$y=1+\frac{1}{x^2}+\frac{1}{x^3}+\frac{1}{x}$
$\tan\left(\infty\right)+\frac{\cos\left(\infty\right)}{1+\sin\left(\infty\right)}=\sec\left(\infty\right)$
$x^2+6xy+5x^2$
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