Guys, please help me with problem.

Answer:
[tex]\boxed{\bold{-25}}[/tex]
Step-by-step explanation:
Remove parenthesis: (a) = a
[tex]\bold{\frac{-5^2+10^2}{-2\cdot \:5\cdot \:3+3^3}}[/tex]
[tex]\bold{-5^2+10^2: \ 75}[/tex]
[tex]\bold{\frac{75}{-2\cdot \:5\cdot \:3+3^3}}[/tex]
[tex]\bold{-2\cdot \:5\cdot \:3+3^3: \ -3}[/tex]
[tex]\bold{\frac{75}{-3}}[/tex]
Apply fraction rule: [tex]\bold{\frac{a}{-b}=-\frac{a}{b}}[/tex]
[tex]\bold{-\frac{75}{3}}[/tex]
Divide [tex]\bold{\:\frac{75}{3}: \ 25}[/tex]
[tex]\bold{-25}[/tex]
Regards,
Mordancy