||'''Book''' ||Advanced Engineering Mathematics ||
 ||'''Author''' ||Erwin Kreyszig ||
 ||'''Edition''' ||8th Edition ||



/* code_begins */

{{{
count=0
for A[0][0] in range(2):
    for A[0][1] in range(2):
        for A[1][0] in range(2):
            for A[1][1] in range(2):
                if A[0][0]*A[1][1]-A[1][0]*A[0][1] != 0:
                    count += 1


print(count)
}}}
/* code_ends */

 * '''Solution by''':

* <N.V.S Saikrishna>, <student>, <Prakasam engineering College>

*<M.Pavan kumar>, <student>, <Prakasam engineering College>

* <T.Raghavendra>, <student>, <Prakasam engineering College>

* <B.Raghavendra>, <student>, <Prakasam engineering College>

* <Y.Siva kumar Reddy>, <student>, <Prakasam engineering College>

* <J.lakshmi narayana>, <student>, <Prakasam engineering College>