下列运算中，正确的是(    )

A：^{$x^2\times x^3=x^6$}

B：$x^3÷x=x^3$

C：^{$2x^2-x^2=x^2$}

D：^{${\left(x^3{y}^2\right)}^2=x^9{y}^4$}