$\left(10.5\right)\left(-7.8\right)\left(-3\:\frac{3}{4}\right)$

$m^4-17m^2+70$

$\:\int_{\pi}^{2\pi}x\:\sin\left(\frac{x}{2}\right)dx$

$a+b+a+2b$

$\frac{2x^3-x^2+x-4}{x-2}$

$\frac{4x^7-2x^6+3x}{x+2}$

$\lim_{x\to\infty}x\left(e^{\frac{1}{x}}-cos\left(\frac{1}{n}\right)\right)$