$\lim_{x\to0}\left(x^2+1\right)^{\frac{1}{x}}$
$tan\left(x-45\right)=\frac{1}{\sqrt{3}}$
$\:\left(4x-6\right)^2$
$\frac{t^2-9}{t^2+3t}\cdot\frac{t^2}{t^2-6t+9}$
$3-x^2+2abx^2-bab$
$0.824\cdot0549$
$\frac{\left(m-n\right)^2}{m^2-m}$
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