$-6=\frac{n}{2}-10$
$-7\left(x+3\right)-8\left(1+8x\right)$
$cos4x=-\frac{1}{2}$
$\int\frac{4x^2+x+3}{\left(x^2+2\right)}dx$
$f\left(x\right)=4x^2-16x+15$
$\frac{4x^5+2x^3-3x\:+1}{x^2-2}$
$y^2-2y=3$
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