1. 1/2m+3/4+5/2-m=1/2m-m+3/4+10/4=-1/2m+13/4=13/4-1/2m
ответ: 13/4-1/2m
2.(15x+2y)+(4x-3y)=15x+4x+2y-3y=19x-y
ответ:19x-y
-5*0,4-1/-5*0,4+1=-2-1/-2+1=-3/-1=3
1.5AB ^ -3 * 6A ^ - 2 * B = 9 A ^ - 5 B ^ - 2
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2x - ay + bz
a = 3c
b = 14c^3
x = 5c^3 + 2
y = 6c^2 - c + 13
z = 5c - 1
2(5c^3 + 2) - 3c*(6c^2 - c + 13) + 14c^3*(5c - 1) =
= 10c^3 + 4 - 3c*6c^2 + 3c*c - 39c + 70c^4 - 14c^3 =
= 10c^3 + 4 - 18c^3 + 3c^2 - 39c + 70c^4 - 14c^3 =
= 70c^4 - 22c^3 + 3c^2 - 39c + 4