$sin^2\left(2\pi x\right)\:=\:4sin^2\left(x\pi\right)cos^2\left(x\pi\right)$
$\left(\frac{x-1}{x+3}\right)\cdot\left(x-2\right)$
$\left(2x^2-7xy+6y^2\right)\left(2x+3y\right)$
$7a^2b+18a^4b^2-3a^3b$
$\int\left(7x^3-5x^2-3x-2\right)dx$
$x+xy;\:x=4;\:y=8$
$\frac{18x^{6}y^{2}z^{5}}{6x^{3}yz^{2}}$
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