$\,5\;(\,7+\,8\,t) = $   ?

$\,-35 +\,13\,\,t$ $\,35 +\,8\,t$ $\,35 \,-8\,\,t$ $\,35 +\,40\,\,t$ $\,35 \,-40\,\,t$ $\,12 +\,13\,\,t$

$(\,-\,b\,-8)\,\times\,\,3 = $   ?

$\,-3\,\,b +\,8$ $\,-3\,\,b +\,24$ $\,2\,\,b \,-5$ $\,-3\,\,b \,-24$ $\,-3\,\,b \,-5$ $\,-3\,\,b \,-8$

$\,-5\;(\,1\,-5\,a) = $   ?

$\,-5 +\,25\,\,a$ $\,-4 \,-10\,\,a$ $\,5 \,-10\,a$ $\,-5 \,-25\,\,a$ $\,-5 +\,5\,\,a$ $\,-5 \,-5\,a$

$(\,5\,b+\,9\,a)\,\times\,\,4\,b = $   ?

$\,9\,\,b^2 +\,13\,\,a\,b$ $\,20\,\,b^2 +\,9\,a$ $\,-20\,\,b^2 +\,13\,\,a\,b$ $\,20\,\,b^2 +\,36\,\,a\,b$ $\,20\,\,b^2 +\,36\,a$ $\,20\,\,b^2 \,-36\,a$

$\,3\,t\;(\,-7\,t+\,8\,x) = $   ?

$\,-21\,\,t^2 \,-24\,x$ $\,-21\,\,t^2 +\,24\,\,t\,x$ $\,-21\,\,t^2 +\,11\,\,t\,x$ $\,-4\,\,t^2 +\,11\,\,t\,x$ $\,-21\,\,t^2 +\,8\,x$ $\,21\,t +\,24\,\,t\,x$

$\,5\;(\,9\,y+\,5\,x) = $   ?

$\,-45\,\,y +\,10\,\,x$ $\,45\,\,y +\,5\,x$ $\,45\,\,y \,-25\,\,x$ $\,45\,\,y \,-5\,\,x$ $\,14\,\,y +\,10\,\,x$ $\,45\,\,y +\,25\,\,x$

$\,3\,t\;(\,3\,-7\,t) = $   ?

$\,9\,\,t +\,21\,t$ $\,9\,\,t \,-7\,t$ $\,9\,\,t \,-21\,\,t^2$ $\,9\,\,t \,-4\,t$ $\,-9 \,-21\,\,t^2$ $\,6\,\,t \,-4\,\,t^2$

$(\,-1+\,7\,a)\,\times\,\,4\,a = $   ?

$\,-4\,\,a +\,28\,\,a^2$ $\,4 +\,28\,\,a^2$ $\,-4\,\,a +\,11\,\,a^2$ $\,-4\,\,a +\,7\,a$ $\,3\,\,a +\,11\,\,a^2$ $\,-4\,\,a \,-28\,a$

$(\,-9\,b\,-3)\,\times\,(\,-3\,a\,) = $   ?

$\,27\,\,a\,b \,-6$ $\,27\,\,a\,b \,-9$ $\,27\,\,a\,b +\,9\,\,a$ $\,-12\,\,a\,b \,-6\,\,a$ $\,-27\,b +\,9\,\,a$ $\,27\,\,a\,b \,-3$

$\,2\,t\;(\,-4+\,5\,x) = $   ?

$\,-2\,\,t +\,7\,\,t\,x$ $\,-8\,\,t \,-10\,x$ $\,-8\,\,t +\,5\,x$ $\,-8\,\,t +\,10\,\,t\,x$ $\,-8\,\,t +\,7\,\,t\,x$ $\,8 +\,10\,\,t\,x$