$$ \begin{align*} \textbf{Izračunaj ove izraze } \&\ a) \frac{ -10 x^{2}+ 1 x - 26 }{(x- -10 )^{2}}= 0 \&b) \frac{ 26 x^{2}+ 4 x - 48 }{(x- 2 )^{2}}= 0 = 0 \&c) \binom{21}{x}\sum_{x}^{x+12} ( X+2X - 2x \cdot 1 ) \&d) X^{3} - 1 X - 1 + 26 X^{2}-\frac{1}{ 48 } X^{2} = 0 \&\end{align*} $$