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

$10f+3.5-4f+5$

$\lim_{x\to-3}\frac{x^3+6x^2+9x}{x^3+27}$

$37-x<35$

$\left(a^2-2\right)\left(a^4+4a^2+16\right)+64$

$\frac{2cot\left(x\right)-sec\left(x\right)csc\left(x\right)}{sec\left(x\right)+csc\left(x\right)}$

$\left(a\:+\:b\right)^2\:-5\left(a\:+\:b\right)\:-\:6$