In The Calc Sequence app, you have to solve all the given expressions and select them in ascending order in the given seconds. You have to tap on all the expressions before the time stops. You need to focus on the next expression . i.e the expression are "2+1" , "4+3" , and "5+6". You need to calculate those expressions and select all the results in ascending sequence. i.e. in the above example 2+1 is select firstly and then "4+3" which is 7, select after "2+1", and then the last expression "5+6" which is 11 in real. You need to pass levels to open other levels. Install the app today and enjoy it