[tex]( - 3) ^{15} \div ( + 3) {}^{13} - ( - 2) {}^{240} \div ( - 2) {}^{238} + ( - 5 {}^{6} ) {}^{3} \div ( + 5 {}^{8} ) {}^{2} = [/tex]
[tex] - 3 {}^{15} \div 3^{13} - ( - 2) {}^{2} - (5 {}^{6} ) {}^{3} \div 5 {}^{16} [/tex]
[tex] - 3 ^{2} - 4 - 5 {}^{18} \div 5 {}^{16} [/tex]
[tex] - 9 - 4 - 5 {}^{2} [/tex]
[tex] - 9 - 4 - 25[/tex]
[tex] - 38[/tex]