Leia \;  avaldise  \; 3a^2+4ab-3b^2 \; väärtus, \; kui\
a=\frac{\sqrt{5}+\sqrt{2}}{\sqrt{5}-\sqrt{2}} \;\;  ja \; \;b=\frac{\sqrt{5}-\sqrt{2}}{\sqrt{5}+\sqrt{2}}. 

Lihtsusta \;  avaldis \
\frac{1}{x\left(x-y   \right)\left( x-z \right)  }+
\frac{1}{y\left(y-x   \right)\left( y-z \right)  }+
\frac{1}{z\left(z-x   \right)\left(z-y\right) }.

a: (sqrt(5) + sqrt(2)) / (sqrt(5) - sqrt(2))
b: (sqrt(5) - sqrt(2)) / (sqrt(5) + sqrt(2))