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275 + 646 = ?
What is 921
520+139=
What is 659
436+227=
What is 663
283-122=
What is 161
353-137=
What is 216
748+158=
What is 903
676+121=
What is 797
564+348=
What is 912
949-813=
What is 136
824-246=
What is 578
637-241=
What is 396