$3.77\cdot1$
$\frac{dt}{dp}=\frac{2+te^{tp}}{2t-pe^{tp}}$
$81m^2-17mn+15n^2+20m^2+3mn-17n^2+53m^2+18mn+7n^2$
$x^2-x-200$
$4x^2-12xy^2+24xy$
$\lim_{x\to0}\left(x\cot\left(\pi-x\right)\right)$
$\left(p-q\right)^2+\left(p-q\right)^2$
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