{x^3+x^3}
{10a^5-7a^5}
{x^2+10xy-3x^2+y^3-8y^3}
{x^5\cdot x^{10}+x^7\cdot x^8}
{(3x^2y^5)^3}
{3a^4(10b+2a^2)}
{a^3b-b(a^3+10)}
{\frac{x^5y^3}{x^2}}
{a^2(\frac{b^{10}}{ab^3})^2}
{\frac{x^3y+xy}{x}}