$(2+4y)^2 = $   ?

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

$(-10x-3)^2 = $   ?

$-100\,x^2\, +60\,x\,+ 9$ $100\,x^2\, +60\,x\,+ 9$ $100\,x^2\, -60\,x\,+ 9$ $100\,x^2\, +30\,x\,+ 9$

$(-5y-6x)^2 = $   ?

$25\,y^2\, +60y\,+ 36\,x^2$ $-25\,y^2\, +60\,x\,y\,+ 36\,x^2$ $25\,y^2\, +30\,x\,y\,+ 36\,x^2$ $25\,y^2\, +60\,x\,y\,+ 36\,x^2$

$(10+7y)^2 = $   ?

$100\, +140\,y\,+ 14\,y^2$ $100\, +140\,y\,+ 49\,y^2$ $100\, -140\,y\,+ 49\,y^2$ $20\, +140\,y\,+ 49\,y^2$

$(2x+6y)(2x-6y) = $   ?

$4\,x^2 \,- 12\,y^2$ $4\,x^2 \,+ 36\,y^2$ $4\,x^2 \,- 6\,y^2$ $4\,x^2 \,- 36\,y^2$

$(10y+7)(10y-7) = $   ?

$100\,y^2 \,- 49$ $20\,y^2 \,- 49$ $100\,y^2\, -140\,y\,+ 49$ $10y \,- 7$