$(\,5\,t+\,8)\,\times\,\,5 = $   ?

$\,25\,\,t +\,40$ $\,25\,\,t \,-40$ $\,25\,\,t +\,8$ $\,25\,\,t +\,13$ $\,10\,\,t +\,13$ $\,25\,\,t \,-8$

$\,2\;(\,8\,t\,-4) = $   ?

$\,16\,\,t +\,4$ $\,16\,\,t \,-4$ $\,16\,\,t \,-8$ $\,16\,\,t +\,8$ $\,16\,\,t \,-2$ $\,10\,\,t \,-2$

$(\,9+\,4\,b)\,\times\,\,4\,b = $   ?

$\,36\,\,b +\,16\,b$ $\,36\,\,b \,-16\,b$ $\,13\,\,b +\,8\,\,b^2$ $\,36\,\,b +\,16\,\,b^2$ $\,36\,\,b +\,4\,b$ $\,-36\,\,b +\,8\,\,b^2$

$\,-4\;(\,2\,y\,-4) = $   ?

$\,-8\,\,y \,-4$ $\,-2\,\,y \,-8$ $\,8\,\,y \,-8$ $\,-8\,\,y +\,16$ $\,-8\,\,y +\,4$ $\,-8\,\,y \,-16$

$(\,-2\,a+\,7\,b)\,\times\,\,4 = $   ?

$\,-8\,\,a \,-28\,\,b$ $\,8\,\,a +\,11\,\,b$ $\,-8\,\,a +\,7\,b$ $\,-8\,\,a \,-7\,\,b$ $\,-8\,\,a +\,28\,\,b$ $\,2\,\,a +\,11\,\,b$

$\,-5\,b\;(\,5\,-8\,a) = $   ?

$\,25\,\,b \,-13\,a$ $\,-25 +\,40\,\,a\,b$ $\,-25\,\,b \,-8\,a$ $\,-25\,\,b +\,40\,\,a\,b$ $\,0\,\,b \,-13\,\,a\,b$ $\,-25\,\,b \,-40\,a$

$(\,2\,x+\,4)\,\times\,\,2\,y = $   ?

$\,4\,\,x\,y \,-8$ $\,4\,\,x\,y +\,6\,\,y$ $\,4\,\,x\,y +\,8\,\,y$ $\,4\,\,x\,y +\,4$ $\,-4\,\,x\,y +\,8$ $\,4\,\,x\,y +\,6\,\,y$

$\,2\,a\;(\,6\,a\,-4\,b) = $   ?

$\,12\,\,a^2 +\,8\,b$ $\,12\,\,a^2 \,-8\,\,a\,b$ $\,12\,\,a^2 \,-4\,b$ $\,-12\,a \,-8\,\,a\,b$ $\,12\,\,a^2 \,-2\,b$ $\,8\,\,a^2 \,-2\,\,a\,b$

$\,4\,a\;(\,7+\,2\,a) = $   ?

$\,28\,\,a +\,8\,\,a^2$ $\,28\,\,a +\,2\,a$ $\,-28\,\,a +\,8\,a$ $\,11\,\,a +\,6\,\,a^2$ $\,28\,\,a +\,6\,\,a^2$ $\,28\,\,a \,-8\,a$

$\,5\,y\;(\,-7\,y+\,4\,x) = $   ?

$\,-35\,\,y^2 \,-20\,x$ $\,35\,\,y^2 +\,9\,\,x\,y$ $\,-2\,\,y^2 +\,9\,\,x\,y$ $\,-35\,\,y^2 +\,20\,\,x\,y$ $\,-35\,y +\,20\,\,x\,y$ $\,-35\,\,y^2 +\,4\,x$