(2) \( -816(+461-899)+499 \)

Solve. \( \begin{array}{l}y=-3 x-4 \\ y=-2 x-2\end{array} \) Submit

Solve. \( \begin{array}{l}-3 x-5 y=5 \\ 5 x+5 y=15\end{array} \) \( (\square, \square) \) Submit

Simplify the following expressions fully: \( 1.2 .1 \quad(x+2)\left(x^{2}-x+3\right) \) \( 1.2 .2 \quad \frac{5}{x+3}-\frac{3}{2-x} \) \( 1.2 .3 \quad \frac{25^{-x} \cdot 15^{x+1}}{3^{x} \cdot 5^{-x}} \)

1) Solve. \( \begin{array}{l}\text { y }=-4 x-3 \\ y=-5 x-6\end{array} \) \( (\square, \square) \) Submit

How many elements are there in a complete solution to \( x^{2}+7 x+2 \equiv 0(\bmod 41) ? \)