$\csc\left(x\right)=-3.1$
$\left(-3\right)^2\left(3\right)$
$6a^2-31a+35$
$\int2x^2\cdot\cos\left(x^3-2\right)dx$
$\frac{x-3}{x+1}\:=\:\frac{x}{x+3}$
$76-43-54+87+91$
$89+k=-42$
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