Question

someone plss try to answer 2 3 4 5 6 7 questions ... urgent

Answer 1

${3}^{ - 7} \div {3}^{ - 10} \times {3}^{ - 5}$
${3}^{( - 7 + 10} \times {3}^{ - 5}$
3 raise to power3 ×3raise to power -5
3 raise to power -2