User:LemonPie11/sandbox


 * $$ A = \int_3^7 \left(2x^2 + 3\right) dx $$


 * $$ A = \left [ \frac {2(7)^3} {3} + 3*7 \right] - \left [ \frac {2(3)^3} {3} + 3*3 \right ] $$


 * $$ A = \left [ \frac {686} {3} + 21 \right] - \left [ \frac {54} {3} + 9 \right ] $$


 * $$ A = \frac {632} {3} + 12 $$


 * $$ A = \frac {668} {3} $$