test1 (basic public test) 30 points (3 points per line):
=12345678901
*98765432109
+10E5
105
+4564564564564554564564
/777777777
-12345678901234
*-2
=101
++2
E

test2 (addition) 18 points (3 points per line with operation):
=195848
+236736743
C
=99999999999
+999999999999
C
=1234567890123456789
+8765432109876543211
C
+9786888
+22293304 
+777777777
E


test3 (subtraction) 15 points (2 points per line with = or 3 points per line with operation):
=-104567
-3333
C
=-192
+200
C
=1001
-909
E

test4 (multiplication) 13 points (3 points per line with operation, except for the last one "*11"  (4 points)):
=11
*137
C
=2114235675
*8983459873
C
=9999999999999999
*999999999999
C
=-101
*11
E

test5 (division) 12 points (3 points per line with operation):
=6251
/7
C
=6543465
/79
C
=3242342353467812323442354253
/873562
C
=8888888888888888
/777777777777
E

test6 (dealing with large numbers) 12 points (3 points per line with = or operation):
=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001
*1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001
C
=999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
+1
E