$90\cdot40$

$17-\left[-3\left(22-42\right)-12\right]+\left(7\times7-1\right)+6$

$\frac{12a^{3}-3a^{2}-5a+10}{4a+3}$

$\lim_{x\to\infty}\left(\frac{9x\sin\left(3\cdot x^{-1}\right)}{\cos\left(x^{-1}\cdot3\right)}\right)$

$348-\left(-125\right)$

$x^2+12n+32=0$

$78+980$