$1,17a-2,15a-3,25a+4,141$

$2\left(x+3\right)\le3\left(2x-1\right)$

$\left(x-\frac{1}{2}\right)\left(x+5\right)$

$\lim_{x,y\to0,0}\frac{x-y}{x+y}$

$\frac{5x^2-x^2+3}{4x}$

$\frac{x}{3^{-1}}-1$

$\int_{9.73}^{11.53}-0.21x^2+4.93x-24.92\sqrt{1+\left(-0.42x+4.93\right)^2}dx$