рассчитывать
in spe habзre [eo, ui, itum], ponere [o, posui, positum] aliquid;
spem ponere, collocare [1];
computare [1];
reri [reor, ratus sum];
subducere [o, xi, ctum];
reputare [1];
ad calculum revocare [1];
+ точно рассчитав bene subducta ratione;