$\frac{d^3}{dx^3}\ln\left(\cos\left(x\right)\right)$
$\lim_{x\to1}\frac{x}{2x-2}-\frac{1}{\ln\left(x\right)}$
$\left(15x-12\right)\left(15x+8\right)$
$5x+2+6x-8-x+3+9x$
$\left(\frac{1}{2}c-d^3\right)^4$
$y=\frac{2}{x^{3}+x}$
$3w^2-5w+3=5$
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