$\left(-2^2-1^2\right)$

$3x^2+5x-6;x=-5$

$5^2+30$

$\lim_{x\to-\infty}\left(\frac{\ln\left(x^4+\right)}{x}\right)$

$\int_1^e\left(\frac{2x^2-5}{x}\right)dx$

$\frac{\left(4x^2+5\right)^2}{\left(x+1\right)^2\left(7x+2\right)}$

$\lim_{t\to\frac{1}{2}}\left(\frac{\:6t-1}{t}\right)$