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-4 1/2+3,8=-4,5+3,8= -0,7
2,7-8= -5,3
-4:1 1/3= -4*3/4= -12/4= -3
-5/8 *1,6= -8/8= -1
9,1 :(-13)= -0,7
1 1/2-(-2/3)=1 3/6+4/6=2 1/6
1 1/5*2,5-3,5:1,4= 3-2,5= 0,5
4*(-0,5)^2 + 6*(2/3)^2=4*0,25+ 6*4/9=1+24/9=1+2 6/9=3 6/9=3 2/3
8^2 -(-4)^3=64-(-64)=64+64=128
-4^2+(-3)^4= -16+81=65