$H\eta\theta\lceil x\rceil$  

 $\lfloor x\rfloor\oint_x^y\int_x^y\frac{\partial x}{\partial y}$  

 $\lfloor x\rfloor\left|\right|$  

 $\lfloor x\rfloor\lceil x\rceil\frac{\partial x}{\partial y}\int_x^y$