$-6\left(3x^2+6\right)$
$\int e^{\cos3x}\sin3xdx$
$\lim_{x\to-1}\left(\frac{5x^4+9x^3+2x+6}{x+1}\right)$
$\int2\sec\left(7x\right)dx$
$4x^2+25x+36=0$
$\frac{1}{5x^2+10x+85}$
$sin\left(x\right)+cos\left(x\right)\cdot cot\left(x\right)=2$
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