$$1=7; \frac{1}{K^{2}}+\frac{1}{L^{2}}+\frac{1}{M^{2}}=\frac{1}{LK}+\frac{1}{LM}+\frac{1}{KM},k^{3}+L^{3}+M^{3}-3k2M=?$$
$\text{false},\ \frac{\left(KL\right)^{2}+\left(KM\right)^{2}+\left(LM\right)^{2}}{\left(KLM\right)^{2}}=\frac{K+L+M}{KLM},\ a=L^{3}+M^{3}-3Mk_{2}+k^{3}$
