An apparatus capable of obtaining a result which is desired by an operator, canceling a result when an erroneous operation is performed and facilitating creation of a mathematical expression is provided. The holding device is itself displaceable along a longitudinal axis between a retracted position in which the mobile apparatus can be placed in or removed from the location and an extended position in which the mobile apparatus is held in position in the housing. 05 weight percent fluticasone propionate and an oil-in-water vehicle that includes excipients.