$11abc-8bc+10abc-10bc$

$\sin\left(x\right)\cdot cos\left(x\right)\cdot sin\left(5x\right)$

$4n+2n+2+2n$

$\lim_{x\to0}\left(\frac{sin\left(\frac{1-cos\left(\pi x\right)}{x}\right)}{x}\right)$

$2x^2-28x+98$

$1.248m-6m$

$3a\:+6-2a+9+5a$