$\csc\left(x\right)+\cot\left(x\right)+\frac{\sin\left(x\right)}{1+\cos\left(x\right)}=\frac{2}{\sin\left(x\right)}$
$\sqrt[6]{a^9.b^{13}}$
$\int\frac{5x^2+8x+7}{x^3-x^2-15x-25}dx$
$\frac{2x^2-5x-6}{x}$
$\lim_{x\to0}\left(ln\left(\frac{lncx}{ln\left(\frac{x}{c}\right)}\right)\right)$
$3\cos^2\left(a\right)+3\cos\left(a\right)=0$
$-4+3-1-5+7-2$
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