chắc rồi

?

hollo

vẫn còn 2007 kìa

ai hỏi ????

hình như chưa xong đâu

vẫn còn nhiều 2007 lắm

rồi đó bn

\(\frac{\partial}{\partial x}\int_0^{\infty}\!\partial\prod{\frac{\partial}{\partial x}\oint\prod{\int_{\placeholder{}}^{\iiint\int\prod{\frac{\partial}{\partial x}\int_{\placeholder{}}^{\mathrm{dd}x\iiint x\dfrac{\mathrm{d}}{\mathrm{d}x}\frac{\partial}{\partial x}\int_{\placeholder{}}^{\int_{\placeholder{}}^{\partial\int_{\placeholder{}}^{\iiint\int_{\placeholder{}}^{\prod{\int_{\placeholder{}}^{\partial\int_{\placeholder{}}^{\prod{\int_{\placeholder{}}^{\iiint\partial\int_{\placeholder{}}^{\partial\int_{\placeholder{}}^{\prod_{\placeholder{}}^{\int_{\placeholder{}}^{\iiint\prod{\mathrm{d}x\prod_{\placeholder{}}^{\prod_{\placeholder{}}^{\sum{\prod{\sum_{\placeholder{}}^{\sum{\sum_{\placeholder{}}^{\sum_{\placeholder{}}^{\sum_{\placeholder{}}^{\sum{\prod{\prod_{\placeholder{}}^{\mathrm{d}x\partial\oint\int_0^{\infty}\!\frac{\partial}{\partial x}\iiint\mathrm{d}x\dfrac{\mathrm{d}}{\mathrm{d}x}\partial\frac{\partial}{\partial x}\frac{\partial}{\partial x}\dfrac{\mathrm{d}}{\mathrm{d}x}\partial\partial\int_0^{\infty}\!\partial\int_0^{\infty}\!\mathrm{d}x\partial\dfrac{\mathrm{d}}{\mathrm{d}x}\partial\partial\partial\partial\partial\oint\int_0^{\infty}\!\iint\iint\int_{\placeholder{}}^{\iint\int\iiint\int_{\placeholder{}}^{\iint\int_{\placeholder{}}^{\iint\int_{\placeholder{}}^{\iiint\int\iint\int_{\placeholder{}}^{\iiint\int\oint\int_{\placeholder{}}^{\oint\frac{\partial}{\partial x}\partial\mathrm{d}x\partial\dfrac{\mathrm{d}}{\mathrm{d}x}\frac{\partial}{\partial x}\mathrm{d}x\partial\mathrm{d}x\partial\partial\mathrm{d}x\dfrac{\mathrm{d}}{\mathrm{d}x}\frac{\partial}{\partial x}\partial}}}}}}\,\mathrm{d}x\,\mathrm{d}x\,\mathrm{d}x\,\mathrm{d}x}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}\,\mathrm{d}x\)