$\left(1-\cos a\right)\left(1+\cos\alpha\right)+\cos^2a$
$\int7\sin^3\left(x\right)\cos\left(x\right)dx$
$\frac{x^3-8}{x+2}$
$3+n-r+p=r-n+p+3$
$\lim_{x\to0}\left(x^2+5x\right)$
$\int t\left(5+3t^2\right)^8dx$
$-5y+x+6y-8x$
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