Question

please solve this quickly.I will mark as brainliest.

Answer 1

784 is the answer after solving the expression.

Answer 2

in a simple way

= (1)3+(2)3+(3)3+(4)3+(5)3+(6)3+(7)3

= 1 + 8 + 27 + 64 + 125 + 216 + 343

=784
Io
Hope ,it helps ✌️