$f\left(x\right)=x^2+\left(m+5\right)x+\left(5m+1\right)$

$125-27x^3$

$6a^2+11a+7a^2-9a$

$\left(6x^{3}-3y^{2}\right)^{2}$

$\left(tan\left(x\right)\:+\:sin\left(x\right)\right)^2$

$\lim_{n\to\infty}\left(\sqrt[n]{\frac{n+1}{2^n+5^n}}\right)$

$\frac{\sin\left(x\right)\cos\left(y\right)}{\cos\left(x\right)\sin\left(y\right)}-1=\tan\left(x\right)\cot\left(y\right)-1$