$\left(b^n\right)\cdot\left(b^2\right)$
$\sec\left(x\right)^2\cdot\cot\left(x\right)-\cot\left(x\right)$
$\sin\left(\frac{5}{6}\right)+\cos^2\left(x\right)=1$
$\frac{1}{3}x^2y^3-\frac{1}{3}y^4;\:x=1;\:y=-1$
$\lim_{x\to0}\left(\frac{1-\cos\left(2x\right)}{e^{2x}-1-2x}\right)$
$\int\left(\frac{x}{1-x^4}\right)dx$
$\left(10x+4\right)dx+3y^2dy=0$
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