$\left(\frac{5}{4}-\frac{7}{6}\right)\cdot\sqrt{0.36}-\left(1+\frac{1}{3}\right)^2-0.3$

$\frac{1}{ab}+\frac{b^2-a^2}{ab^3}+\frac{ab+b^2}{a^2b^2}$

$\lim_{x\to45}\left(\left(\frac{32-tan\left(x\right)}{x^5}\right)\right)$

$\frac{3x^2-17x-28}{3x-4}$

$\sin\left(u\right)=-\frac{\sqrt{3}}{2}$

$\lim_{x\to\infty}\left(\frac{x+3}{x-1}\right)^{x+1}$

$12+4s=4\left(s+3\right)$