$\sin\left(18\right)\cos\left(80\right)-\sin\left(10\right)\sin\left(80\right)$
$\frac{d}{dx}16x^2+y^2-64x+2y+49=0$
$\frac{9.51573}{20}$
$2m^2-100$
$\int\frac{x-1}{2x+4}dx$
$ab+5ab^2$
$5\left(x-3\right)=15$
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