$\lim_{x\to0}\left(\frac{sin^5x}{x^5}\right)$

$tanx-\frac{3}{2}=0$

$18m^2-16n^2-9m^2$

$10\:.\frac{x^{\frac{1}{2}}}{\frac{1}{2}}$

$3ab^2+3ab^2$

$\left(3a-b+3ab\right)\times\:\left(-a-b\right)$

$\cot\left(x\right)\left(\cos\left(x\right)+\tan\left(x\right)\cdot\sin\left(x\right)\right)=\csc\left(x\right)$