212+366=
335+433=
682+793=
597-75=
841-349=
982-269=
21+=655
484+=795
277+=949
79×7=
6×135=
813×4=
228÷3=
672÷8=
702÷9=

-217=871-307
191+200+330+233=
776-373=+279
436+340+224-989=
279++288=963
576+230-303-332=
454+-627=430
999-155-311-475=