$2\cos\left(x\right)-5=3\cos\left(x\right)-4$
$\int\frac{-3}{\left(x+4\right)}dx$
$\frac{180}{12}$
$x^8-49y^2$
$\int2\sin x\cdot\cos^2x$
$2\:\left(x^4-20x^2+64\right)$
$\left(-2b+2c\right)^2$
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