$\int\left(4x^4+12x^2+9\right).5x.dx$
$7\left(x+3\right)-3\left(2x-2\right)$
$\frac{x+1}{3x+2}=\frac{x-2}{2x-2}$
$78a^2bc^3-5a^2bc^3+3a^2bc^3-2a^2$
$5x^2-10x+3$
$-3\left(-4\right)-10$
$\cos x=\frac{4}{7}+2\cos x$
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