To count successes instead of summing the dice, add e followed by the threshold.

Like this, to roll four d10 counting sevens and higher as success:

 4d10e7

In this mode, a h or a l gives you advantage or disadvantage on each die individually.

Like this example, to roll five sets of two d20 (so ten total), discard the highest of each pair because of disadvantage, and add three, and compare that to DC 15:

 5d20l+3 e 15

In this mode, d is shorthand for d20. To roll four morale checks each at -1:

 4d-1e10

This mode can not handle division and other fancy expressions. Basics only. (It checks if the e is there to determine which mode to use.)