$\int4\:cos\left(\pi x\right)dx$
$\left(a+b\right)\left(x-y-z\right)$
$\lim_{x\to0}\left(\frac{-4x^3+3x}{3x^2+2}\right)$
$0=cos^2\theta\:-2sin\theta\:-sin^2\theta\:$
$\frac{b^6+1}{b+1}$
$2x<-6$
$2m^2=9m+18$
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