491+357=
254+436=
410+794=
729-31=
921-653=
938-162=
63+=859
277+=709
308+=959
71×7=
9×25=
836×4=
777÷3=
256÷8=
894÷6=

-256=894-431
164+192+479+194=
753-220=+345
502+309+275-994=
200++386=967
461+487-236-361=
243+-534=437
999-241-129-455=