Arithmetic Operator Puzzles

#961: 2 _ 9 _ 4 _ 3 = 14 hard #962: 2 _ 9 _ 4 _ 8 = 20 hard #963: 2 _ 9 _ 4 _ 6 = -4 medium #964: 2 _ 9 _ 4 _ 4 = 17 hard #965: 2 _ 9 _ 4 _ 6 = 12 medium #966: 2 _ 9 _ 4 _ 8 = 9 medium #967: 2 _ 9 _ 5 _ 3 = 17 hard #968: 2 _ 9 _ 5 _ 5 = 19 hard #969: 2 _ 9 _ 5 _ 5 = 17 hard #970: 2 _ 9 _ 5 _ 6 = 15 hard #971: 2 _ 9 _ 6 _ 8 = 14 hard #972: 2 _ 9 _ 6 _ 4 = -4 medium #973: 2 _ 9 _ 6 _ 6 = 19 hard #974: 2 _ 9 _ 6 _ 3 = 16 hard #975: 2 _ 9 _ 6 _ 6 = 17 hard #976: 2 _ 9 _ 6 _ 1 = 2 easy #977: 2 _ 9 _ 6 _ 3 = 6 medium #978: 2 _ 9 _ 6 _ 3 = 1 easy #979: 2 _ 9 _ 6 _ 4 = 7 medium #980: 2 _ 9 _ 6 _ 4 = -1 easy #981: 2 _ 9 _ 6 _ 4 = 12 medium #982: 2 _ 9 _ 6 _ 5 = 8 medium #983: 2 _ 9 _ 6 _ 5 = -2 medium #984: 2 _ 9 _ 6 _ 5 = 15 hard #985: 2 _ 9 _ 6 _ 6 = 9 medium #986: 2 _ 9 _ 6 _ 6 = -3 medium #987: 2 _ 9 _ 6 _ 7 = -4 medium #988: 2 _ 9 _ 6 _ 8 = 11 hard #989: 2 _ 9 _ 6 _ 9 = -6 medium #990: 2 _ 9 _ 6 _ 3 = 4 easy #991: 2 _ 9 _ 6 _ 6 = 8 easy #992: 2 _ 9 _ 7 _ 7 = 19 hard #993: 2 _ 9 _ 7 _ 7 = 17 hard #994: 2 _ 9 _ 7 _ 9 = 14 hard #995: 2 _ 9 _ 8 _ 6 = 14 hard #996: 2 _ 9 _ 8 _ 8 = 19 hard #997: 2 _ 9 _ 8 _ 2 = 14 hard #998: 2 _ 9 _ 8 _ 4 = 16 hard #999: 2 _ 9 _ 8 _ 8 = 17 hard #1000: 2 _ 9 _ 9 _ 9 = 19 hard #1001: 2 _ 9 _ 9 _ 3 = 15 hard #1002: 2 _ 9 _ 9 _ 9 = 17 hard #1003: 3 _ 1 _ 2 _ 8 = 7 easy #1004: 3 _ 1 _ 2 _ 8 = -1 easy #1005: 3 _ 1 _ 3 _ 9 = 6 medium #1006: 3 _ 1 _ 4 _ 8 = 5 easy #1007: 3 _ 1 _ 4 _ 8 = 1 easy #1008: 3 _ 2 _ 2 _ 2 = 7 easy