$\int cos^5\left(7x\right)sin\left(7x\right)dx$
$\frac{1-\sin^2x}{\cot^2x}$
$-2x^2+4x+3=-3x^2+6x-7$
$2^3\cdot2^3$
$\frac{dy}{dx}\left(-2y=10e^{-3x}\right)$
$\lim_{x\to\infty}\left(\frac{x+3}{x}\right)$
$2-secx\cdot cscx$
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