GRE
The area of a circular region with radius $$r$$
The area of a circular region with radius $$r^{2}$$
$$x^{2}$$+$$\frac{1}{x^{2}}$$
$$x^{3}$$+$$\frac{1}{x^{3}}$$
The remainder when n(n+1)(n+2) is divided by 6
1
The area of triangular region XYZ
The area of triangular region KLM
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