$\tan^{-1}\left(\frac{\frac{-3}{2}}{\frac{-1}{2}}\right)$

$-7+5\left(-5\right)$

$4x^2-2x+0.25=0$

$21+\frac{5}{9}\left(\frac{1}{100}0.01-10\right)$

$\frac{1+sin\left(y\right)}{\cos\left(y\right)}+\frac{\cos\left(y\right)}{1+\sin\left(y\right)}=2secy$

$\int_x^{\ln\left(x\right)}\frac{e^g}{g}dg$

$x^2-9x-4$