2/11(х+у) при х=-13, у=2, -0.8ху при х=-10,у=-0.5 -3/4х(х-у) при х=5,у=13. (-4/5)х(-3/8)х(5/12) (-9/10)х5/6х(-2/3) -63х(7-11) 9.9х(3-5) -2.2х(8-3) (26-11)х(-0.4) (32-40)х3.5 (0.99-1)х26

  2/11(х+у)=2/11(-13+2)=2/11*(-11)=-2

-0,8ху=-0,8*(-10)*(-0,5)=8*(-0,5)=-4

-3/4*(х-у)=-3/4*(5-13)=-3/4*(-8)=6

 (-4/5)*(-3/8)*(5/12)=3/10*5/12=1/12

(-9/10)*5/6*(-2/3)=(-3/4)*(-2/3)=1/2

 -63*(7-11)=-63*(-4)=252

9,9*(3-5)=9,9*(-2)=-19,8

-2,2*(8-3)=-2,2*5=-11

(26-11)*(-0,4)=15*(-0,4)=-6

(32-40)*3,5=-8*3,5=-28

(0,99-1)*26=-0,01*26=-0,26