Question

(+3) x (-1) x (+2) x (+5) ?

Answer 1

$(+3) * (-1) * (+2) *(+5)\to \\\\ -3*10\to \\\\ -30$

Answer 2

(+ 3) . ( - 1) . ( + 2) . ( + 5)

(- 3) . ( + 10) = - 30