easy

According to BODMAS (or PEMDAS ), the problem goes like this:

$(40+30+((20\times 0)\times 2)+70)/70\\ (40+30+((0)\times 2)+70)/70\\ (40+30+(0)+70)/70\\ (70+0+70)/70\\ (140)/70\\ =\quad \boxed { 2 } \quad$

In BODMAS we first check inside the bracket

then there is no division so we move to multiplication

20 x 0 x 2 = 0

because anything multiplied by 0 = 0

now to addition

first we have 40 + 30 = 70

the + 70 = 140

now outside the bracket we have :

/ 2

or divided by 2

so 140 divided by 2 is 70