(7x^6+2x^5-3x^2+9x)+(5x^5+8x^3-6x^2+2x-5) square

To solve this problem, we need to combine like terms in the given expression.<br /><br />The given expression is:<br />$(7x^{6}+2x^{5}-3x^{2}+9x)+(5x^{5}+8x^{3}-6x^{2}+2x-5)$<br /><br />Step 1: Combine the like terms.<br />$7x^{6} + (2x^{5} + 5x^{5}) + 8x^{3} + (-3x^{2} - 6x^{2}) + (9x + 2x) - 5$<br />$= 7x^{6} + 7x^{5} + 8x^{3} - 9x^{2} + 11x - 5$<br /><br />Therefore, the simplified expression is:<br />$7x^{6} + 7x^{5} + 8x^{3} - 9x^{2} + 11x - 5$