$\frac{32x^2+10x-54}{8x\:-\:9}$

$\tan\left(30\right)+\cot\left(30\right)$

$\lim n\to0\left(\left(1+\frac{1}{2n}\right)^{n^2}\right)$

$\left(3\:-\:x\right)\left(a\:+\:b\right)\:+\:\left(a\:+\:b\right)\left(3x\:-\:10\right)\:$

$\lim_{x\to\infty}\left(\frac{x^2-9}{x^2+1}\right)$

$\sin\left(x\right)=\frac{3,12}{4}$

$245m^2-320$