Đáp án:
$0$
Giải thích các bước giải:
( $1$ + $3$ + $5$ + .. + $145$ + $147$ + $149$ ) x ( $125125$ x $127$ - $125$ x $127127$ )
= ( $1$ + $3$ + $5$ + .. + $145$ + $147$ + $149$ ) x ( $15890875$ - $15890875$ )
= ( $1$ + $3$ + $5$ + .. + $145$ + $147$ + $149$ ) x $0$
= $0$