$3x^2-x^2+6x-2$
$5a^2b^3c;\:a=1;\:b=2$
$-x+x^2-3x^2$
$\frac{x^2+3x+2}{-3x^2+19x-6}$
$sinx-4=8sinx$
$\int7\sin^2\left(5x\right)dx$
$25g^2-80g+64$
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