题目内容
计算:(16x2y3z+8x3y2z)÷8x2y2=________.
计算:
(1)(6x4-3x3+2x2-x)÷(-2x);
(2)(16x2y3-8x3y2z)÷8x2y2;
(3)[(-x4y3)2-(-x3y4)2]÷(-x2y3)2.