3x-ay+bz
a=3c
b=11c³
x=5c³+2
y=5c²-c+13
z=5c-1
3(5c³+2)-3c(5c²-c+13)+11c³(5c-1)= 15c³+6-15c³+3c²-39c+55c⁴-11c³= 55c⁴-11c³+3c²-39c+6
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Verified answer
3x-ay+bz
a=3c
b=11c³
x=5c³+2
y=5c²-c+13
z=5c-1
3(5c³+2)-3c(5c²-c+13)+11c³(5c-1)= 15c³+6-15c³+3c²-39c+55c⁴-11c³= 55c⁴-11c³+3c²-39c+6