Which term in the expansion of `{(x/sqrty)^ (1/3)+(y/(x)^(1/3))^(1/2)}^21`contains x and y to one and the same power ?

Which term in the expansion of (((x)/(sqrt(y)))^((1)/(3))+((y)/((x)^((1)/(3))))^((1)/(2))}^(21) contains x and y to one and the same power?

The number of terms in the expansion of (1+x)^(21)=

) The constant term in the expansion of (x^(2)+(1)/(x^(2))+y+(1)/(y))^(8)

The term containing x in the expansion of (x^(2)+(1)/(x))^(5) is

What is the number of terms in the expansion of [(2x - 3y)^(2)(2x+3y)^(2)]^(2) ?