$x+2=2x-1$
$\frac{-\cos\:^3\left(x\right)+\sin\:^3\left(x\right)}{\sin\:\left(x\right)\cos\:\left(x\right)\left(\cos\:\left(x\right)-\sin\:\left(x\right)\right)}$
$\int\left(\sqrt{\frac{x-9}{x}}\right)dx$
$\frac{d}{dx}y^4-xy=1-x^3$
$\left(5x^2+8x-3\right)+\left(2x^2-7x+13x\right)$
$e^{2x}\cdot2e^{2x}$
$5^5\:.\:b^{-5}$
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