What is 30 / 7 times (7 / 15 minus 3 / 20) minus 5 / 14? For example, there should be complete steps,

What is 30 / 7 times (7 / 15 minus 3 / 20) minus 5 / 14? For example, there should be complete steps,

30/7（7/15-3/20）-4/14
=2-9/14-5/14
=1

How about four and seven fifteen times fifteen
One more question
45 times (7 / 9 + 4 / 15 - 3 / 5)

=（4+7/15）*15
=4*15+7/15*15
=60+7=67
=45*7/9+45*4/15-45*3/5
=35+12-27
=20

Twelve fifths multiplied by four fifths of brackets, plus two fifths, and brackets minus three fifths

12/5×(4/15+2/5)-3/5
=12/5×10/15-3/5
=24/15-3/5
=8/5-3/5
=1;
If you ask questions from your mobile phone, just click "satisfied" in the upper right corner of the client