$\frac { 12 n ^ { 2 } - 8 n } { 2 n }$
$a^5b.8a^3b^2.a^4b^1$
$f\left(x\right)=3\sin\left(2x^{2}+3x^{2}+2x\right)$
$-8y\:+\:3x\:-\:5x\:-\:2\:+\:y$
$-3a^3+2b+5a^3$
$\frac{dy}{dx}=-\frac{y}{\left(3.9^2-y^2\right)^{\left(\frac{1}{2}\right)}}$
$\left(3y+4\right)^2$
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