$\int\:\left(\frac{x}{x^2+x+1}\right)dx$
$\frac{\left(cot^2\right)}{1-sin}$
$3xy;\:x=-2;\:y=\:6$
$y^2-10y+2$
$\left(x-3\right)\frac{7}{x-3}=\frac{22}{x+3}\left(x+3\right)$
$\int\tan^7\left(x\right).\sec^7\left(x\right)dx$
$3n+6$
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