## SUBJECT I

Calculate:

$$
\mathrm{a}=\left\{\left[2^{3} \cdot 5^{2}+\left(25^{50}: 5^{99}+2^{2} \cdot 3\right) \cdot 5^{2}\right]: 5^{3}+2^{7}+11^{1991}:\left(11^{2}\right)^{995}\right\}:\left(3^{3}+3^{2}\right)
$$
Solution:

![](https://cdn.mathpix.com/cropped/2024_06_07_cc8ac07229c0dd5d256fg-2.jpg?height=77&width=1390&top_left_y=1201&top_left_x=390)

![](https://cdn.mathpix.com/cropped/2024_06_07_cc8ac07229c0dd5d256fg-2.jpg?height=60&width=1305&top_left_y=1318&top_left_x=455)

$$
\begin{aligned}
& \left\{(25 \cdot 25): 5^{3}+128+11\right\}: 36 \text {............................................................................ } 2 p \\
& \{5+128+11\}: 36 \quad \text {.............................................................................................. } 1 p
\end{aligned}
$$

$$
144: 36=4 \quad \text {.........................................................................................1p }
$$