计算:(1)(-4)-(+13)+(-5)-(-9)(2)24×(18?13+14)(3)-32×(-2)+42÷(-2)3(4)4(x2-5

计算:(1)(-4)-(+13)+(-5)-(-9)(2)24×(18?13+14)(3)-32×(-2)+42÷(-2)3(4)4(x2-5x)-5(2x2+3x)(5)|-79|÷(23?15)-13×(-4)2.

(1)原式=-4-13-5+9
=-17-5+9
=-22+9
=-13;

(2)原式=24×
1
8
-24×
1
3
+24×
1
4

=3-8+6
=1;

(3)原式=-9×(-2)+16÷8
=18+2
=20;

(4)原式=4x2-20x-10x2-15x
=(4-10)x2-(20+15)x
=-6x2-35x;

(5)原式=
7
9
÷
7
15
-
1
3
×16
=
7
9
×
15
7
-
16
3

=-
11
3
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