$-\frac{9}{2}b+5a+a+b+3c-\frac{6}{3}b-\frac{5}{4}a$

$5.\:\left(-7+3\right)\:-12\::\:\left(-4\right)\:+20:\left(-5\right)$

$\frac{\left(xy-3y+x-3\right)}{\left(xy+2y-x-2\right)}$

$\frac{x^4-8x^3+3x+10}{x-10}$

$e\frac{5}{\sqrt{2}}$

$3x+5>x-7$

$\lim_{x\to0}\left(\frac{\left(1+h\right)^8+\left(1+h\right)^3-2}{h}\right)$