Question Number 146584 by mnjuly1970 last updated on 14/Jul/21
$$ \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:……{nice}\:…\:…\:…\:{calculus}…… \\ $$$$\: \\ $$$$\Omega=\:\int_{\mathrm{0}} ^{\:\mathrm{4}} {x}^{\:\mathrm{2}} \:{d}\:\left(\lfloor{x}+\lfloor{x}\:+\lfloor{x}+\lfloor{x}\rfloor\rfloor\rfloor\right)=?\: \\ $$$$ \\ $$