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//Clearing console
clc
clear
//Intializing variables
r(1) = sqrt(3)/3
r(2) = -sqrt(3)/3
s(1) = sqrt(3)/3
s(2) = -sqrt(3)/3
W(1) = 1
W(2) = 1
I = 0
//Gaussian quadrature Integration
for j =1:2
for i =1:2
I = I + W(i)*W(j)*((r(i))^3 -1)*(s(j)-1)^2
end
end
printf('\nResults')
printf('\nIntegration of given function I =%f',-I)
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