example
x=11
a=[1 2 3 4];
p=[10 15 20 25]
sum(a.*x.^p)
% the result is
a(1)*x^p(1)+a(2)*x^p(2)+...
./ and .* and .^ are operations element by element
for your case
c=[1.1 1.4 0.25 ]
p1=[2 7 6]
p2=[9 4 8]
a=10;b=30
out=sum(c.*a.^p1.*b.^p2)
you can also create a function
f1=@(c,p1,p2,a,b) sum(c.*a.^p1.*b.^p2)
then
out=f1(c,p1,p2,a,b)
