$34-65+89+88+765$

$\left(x^{2}+2x+2\right)y^{\prime}=x+1$

$4\cdot5\cdot\left(6\right)$

$\lim_{x\to a}\left(2-\frac{x}{a}\right)^{\tan\left(\frac{x\pi}{2a}\right)}$

$\left(x^{\frac{7}{2}}-4\right)\left(x^3+3\right)$

$\frac{3m^3-5n^3}{m^3+n^3}$

$49\cdot\left(-3\right)$