$-305+\left(-98\right)$
$548.02-22.164$
$17.-x^{2}+2xy+y^{2},x=2y=2.5$
$\lim_{x\to0}\left(\frac{3x+\sin\left(x\right)}{2x}\right)$
$\frac{3}{x}+\frac{1}{2x}-\frac{5}{3x}$
$\left(2x^{-5}y^4\right)^3$
$\int z\sqrt{z+4}dz$
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