$\frac{2}{6}x\frac{2}{6}$
$\frac{90}{3.14}$
$-5-x^4+2x^2-3x^3+x^3+5x^2-4x$
$\left(1+tan^2w\right)cos^2w=1$
$-36\:+1$
$\lim_{x\to1}\frac{3x^4-4x^3+1}{\left(x-1\right)^2}$
$\left(2x+3m\right)^2$
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