$y=\frac{x^4}{3}-\frac{x^2}{7}+5$

$6a^2+11a-21$

$\left(x+2\right)dx=\left(x+3\right)\sin\left(y\right)\cos\left(y\right)dy$

$\left(2a^2+4b^2\right)^2$

$4x^2+12x+8x^2$

$\frac{\left(\tan\left(175\right)-\tan\left(130\right)\right)}{\left(1+\tan\left(175\right)\tan\left(130\right)\right)}$

$\left(+56\right)-\left(-65\right)+\left(+69\right)-\left(+58\right)+\left(+72\right)+\left(-83\right)-\left(+52\right)+\left(-76\right)$