$-12305+-111$

$a+7\cdot2a-3$

$3y-\left(-5+9y\right)$

$\int_0^1\left(\frac{2x-5}{x^2-5x+6}\right)dx$

$\lim\:_{x\to\:\infty\:}\left(\frac{9x^2+5}{8x^2+3x+1}\right)^{\frac{1}{x}}$

$\frac{60\:\left(\cos\:\left(210\right)+i\sin\left(210\right)\right)}{20\left(\cos\left(70\right)+i\sin\left(70\right)\right)}$

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