$6\cos^2y+3\cos y=0$
$\frac{15x}{3x-9}$
$\frac{50}{35.27}$
$\frac{dy}{dx}=\frac{3\sin\left(x\right)}{y}$
$\int_0^{100}-e^{-x}dx$
$\int2sin\left(4x\right)dx$
$z^2+22z+121$
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