\begin{equation}7x^{2}+5x-5-(7x^{2}+6)\end{equation}

\begin{equation}5x^{2}y^{2}+8xy^{3}-8y^{4}-(x^{2}y^{2}-9xy^{3}+5y-8y^{4})\end{equation}

\begin{equation}7x^{3}+10x^{2}-10x+4-(4x^{3}-2x^{2}+6x-3)\end{equation}

\begin{equation}3x^{4}y+2x^{3}y^{2}-7x^{2}y^{3}-(7x^{4}y+6x^{3}y^{2}-6xy)\end{equation}

\begin{equation}8x^{2}-5x+4-(3x^{2}+10x+6)\end{equation}

\begin{equation}8x+4-(4x^{2}-7x+10)\end{equation}

\begin{equation}8A^{2}+6Ay+y-((-7)A^{2}+3Ay-10y)\end{equation}

\begin{equation}6x^{5}-8x^{4}-3-(5x^{5}+4x^{4}-2)\end{equation}

\begin{equation}(-6)x^{4}+2x^{2}y-7x+y-((-8)x^{4}-8x^{2}y+x)\end{equation}

\begin{equation}(-8)x^{2}+2xy-2y-((-4)x^{2}-5xy+6y)\end{equation}

\begin{equation}xy-8y^{2}+4xy^{3}-(5xy^{3}+5y^{2}+10xy)\end{equation}