(1)原式=﹣3﹣6+4=﹣9+4=﹣5;
(2)原式=﹣
=﹣
=﹣
;
(3)原式=36+6×
=36+1=37;
(4)原式=﹣16+3×1+100?25=﹣16+3+4=﹣9;
(5)原式=3a+2b﹣2a+8b=a+10b;
(6)(2x 2﹣5xy)﹣3(x 2﹣y 2)+x 2﹣3y 2
=2x 2﹣5xy﹣3x 2+3y 2+x 2﹣3y 2
=﹣5xy,
当x=﹣3,
时,
原式=﹣5×(﹣3)×
=5.
(1)原式=﹣3﹣6+4=﹣9+4=﹣5;
(2)原式=﹣
=﹣
=﹣
;
(3)原式=36+6×
=36+1=37;
(4)原式=﹣16+3×1+100?25=﹣16+3+4=﹣9;
(5)原式=3a+2b﹣2a+8b=a+10b;
(6)(2x 2﹣5xy)﹣3(x 2﹣y 2)+x 2﹣3y 2
=2x 2﹣5xy﹣3x 2+3y 2+x 2﹣3y 2
=﹣5xy,
当x=﹣3,
时,
原式=﹣5×(﹣3)×
=5.