$\,9\,x + (\,4 - \,5\,x + \,6\,y) =$ ?

$\,14\,x \,-6\,y \,-4$ $\,14\,x +\,6\,y +\,4$ $\,-4\,x +\,6\,y \,-4$ $\,4\,x +\,6\,y +\,4$ $\,4\,x \,-6\,y +\,4$

$\,6\,x - ( - \,7\,\,x^2 - \,6 ) + \,8\,x=$ ?

$\,7\,\,x^2 +\,14\,x +\,6$ $\,-7\,\,x^2 +\,14\,x +\,6$ $\,7\,\,x^2 \,-2\,x +\,6$ $\,-7\,\,x^2 +\,14\,x \,-6$ $\,7\,\,x^2 +\,14\,x \,-6$

$ \,8\,x - \,8\,\,x^2 - ( - \,7\,\,x^2 + \,7\,x )=$ ?

$\,-\,\,x^2 +\,15\,x$ $\,-15\,\,x^2 +\,15\,x$ $\,-\,\,x^2 +\,x$ $\,-15\,\,x^2 +\,x$ $\,15\,\,x^2 +\,x$

$ \,9\,\,x^2 - ( \,1 + \,8\,\,x^2 + \,2\,x)=$ ?

$\,17\,\,x^2 +\,2\,x +\,1$ $\,\,x^2 \,-2\,x \,-1$ $\,\,x^2 +\,2\,x +\,1$ $\,17\,\,x^2 \,-2\,x \,-1$ $\,\,x^2 +\,2\,x \,-1$

$\,2 + ( - \,4\,x + \,1) - ( \,4 - \,8\,x) =$ ?

$\,-12\,x \,-1$ $\,4\,x \,-1$ $\,4\,x \,-3$ $\,x +\,2$ $\,4\,x +\,7$

$ \,x + \,5\,y - ( \,7\,x - \,7\,y)=$ ?

$\,8\,x \,-2\,y$ $\,-6\,x +\,12\,y$ $\,8\,x +\,12\,y$ $\,-6\,x +\,2\,y$ $\,-6\,x \,-2\,y$