How to specify power in select cause SPARQL

[Maria Jackson]

Dear All,

select ?a?b?c?r where{ graph ?graph1{?a ?b <object1>} graph ?graph21{?a ?c
<object2>} graph ?graph2{?a <time> ?r}} order by asc(?r+(1.1*10^(11)))
limit 1

If I write the above expression to denote: ?r + (1.1 x (pow(10,11))) then
will it be a correct expression in Jena. I am struggling to find how to
express power in Jena?