Express each of the following expressions as the sum of two squares: `(1+x^(2))(1+y^(2))`

Express each of the following expressions as the sum of two squares: (a^(2)+b^(2))(c^(2)+d^(2))

Express each of the following numbers as a sum of two odd primes : 92

Express each of the following numbers as a sum of two odd primes : 36

Express each of the following numbers as a sum of two odd primes : 82

Express each of the following numbers as a sum of two odd primes : 59

Express each of the following numbers as a sum of two odd primes : 106

Express each of the following as the sum of two consecutive natural numbers : 21^(2) (ii) 13^(2) (iii) 19^(2)