$14x^2-10x+4$
$cotx\left(1+tan^2x\right)=\frac{1}{\sin\left(x\right)\cos\left(x\right)}$
$\frac{1}{3x^2}+2x^3+\frac{2}{\sqrt{x}}$
$-56ab-14cd$
$\frac{x^{15}}{x^4}+x+1$
$5x-13>-15x+7$
$\frac{d}{dx}\cos\left(x+y\right)=\sin\left(x\right)\cdot\sin\left(y\right)$
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