Question

plz answer part I only

Answer 1

this is the answer of your math

Answer 2

Heya!!!

$x {}^{ - 1} = 1 \div x \: \: \: \: and \: \: \: \: (x \div y) {}^{ - 1} = y \div x \\ \\ \\( 1 \div 7 \: \: \: + \: \: \: 2 \div 3) {}^{ - 1} \\ \\ (17 \div 21) {}^{ - 1} \\ \\ 21 \div 17 \\ \\ have \: a \: nyc \: tym$