\(\sin^225+\sin^265-\tan35+\cot55-\dfrac{\cot32}{\tan58}\)

giúp mik vs ạ

\(\tan^240.sin^250-3+\left(1-sin40\right)\left(1+sin40\right)\)

\(\sqrt{a^3+a^2+4}+\sqrt{a^3+a^2-3}=7\)

giúp mik vs ạ

\(\dfrac{1}{\sqrt{4}+\sqrt{5}}+\dfrac{1}{\sqrt{5}+\sqrt{6}}+\dfrac{1}{\sqrt{6}+\sqrt{7}}+.........+\dfrac{1}{\sqrt{34}+\sqrt{35}}+\dfrac{1}{\sqrt{35}\sqrt{36}}\)
giúp mik vs ạ mình cảm ơn ạ!!