हल करना sqrt(4 * 7 ^ 21 + (7 ^ 21 - 1) ^ 2) - 7 ^ 21 | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$\sqrt{4\times7^{21}+(7^{21}-1)^{2}}-7^{21}$$